Add latest changes from gitlab-org/gitlab@13-11-stable-eev13.11.0-rc43

52 files changed, 925 insertions, 1312 deletions

diff --git a/app/assets/javascripts/boards/boards_util.js b/app/assets/javascripts/boards/boards_util.js
index 2cd25f58770..a8b870f9b8e 100644
--- a/app/assets/javascripts/boards/boards_util.js
+++ b/app/assets/javascripts/boards/boards_util.js
@@ -1,4 +1,4 @@
-import { sortBy } from 'lodash';
+import { sortBy, cloneDeep } from 'lodash';
 import { getIdFromGraphQLId } from '~/graphql_shared/utils';
 import { ListType, NOT_FILTER } from './constants';
 
@@ -113,6 +113,37 @@ export function formatIssueInput(issueInput, boardConfig) {
   };
 }
 
+export function shouldCloneCard(fromListType, toListType) {
+  const involvesClosed = fromListType === ListType.closed || toListType === ListType.closed;
+  const involvesBacklog = fromListType === ListType.backlog || toListType === ListType.backlog;
+
+  if (involvesClosed || involvesBacklog) {
+    return false;
+  }
+
+  if (fromListType !== toListType) {
+    return true;
+  }
+
+  return false;
+}
+
+export function getMoveData(state, params) {
+  const { boardItems, boardItemsByListId, boardLists } = state;
+  const { itemId, fromListId, toListId } = params;
+  const fromListType = boardLists[fromListId].listType;
+  const toListType = boardLists[toListId].listType;
+
+  return {
+    reordering: fromListId === toListId,
+    shouldClone: shouldCloneCard(fromListType, toListType),
+    itemNotInToList: !boardItemsByListId[toListId].includes(itemId),
+    originalIssue: cloneDeep(boardItems[itemId]),
+    originalIndex: boardItemsByListId[fromListId].indexOf(itemId),
+    ...params,
+  };
+}
+
 export function moveItemListHelper(item, fromList, toList) {
   const updatedItem = item;
   if (
diff --git a/app/assets/javascripts/boards/components/board_add_new_column.vue b/app/assets/javascripts/boards/components/board_add_new_column.vue
index 3c7c792b787..d4b559add6e 100644
--- a/app/assets/javascripts/boards/components/board_add_new_column.vue
+++ b/app/assets/javascripts/boards/components/board_add_new_column.vue
@@ -1,23 +1,16 @@
 <script>
-import {
-  GlFormRadio,
-  GlFormRadioGroup,
-  GlLabel,
-  GlTooltipDirective as GlTooltip,
-} from '@gitlab/ui';
+import { GlFormRadio, GlFormRadioGroup, GlTooltipDirective as GlTooltip } from '@gitlab/ui';
 import { mapActions, mapGetters, mapState } from 'vuex';
 import BoardAddNewColumnForm from '~/boards/components/board_add_new_column_form.vue';
 import { ListType } from '~/boards/constants';
 import boardsStore from '~/boards/stores/boards_store';
 import { getIdFromGraphQLId } from '~/graphql_shared/utils';
-import { isScopedLabel } from '~/lib/utils/common_utils';
 
 export default {
   components: {
     BoardAddNewColumnForm,
     GlFormRadio,
     GlFormRadioGroup,
-    GlLabel,
   },
   directives: {
     GlTooltip,
@@ -26,17 +19,12 @@ export default {
   data() {
     return {
       selectedId: null,
+      selectedLabel: null,
     };
   },
   computed: {
     ...mapState(['labels', 'labelsLoading']),
     ...mapGetters(['getListByLabelId', 'shouldUseGraphQL']),
-    selectedLabel() {
-      if (!this.selectedId) {
-        return null;
-      }
-      return this.labels.find(({ id }) => id === this.selectedId);
-    },
     columnForSelected() {
       return this.getListByLabelId(this.selectedId);
     },
@@ -89,8 +77,13 @@ export default {
       this.fetchLabels(searchTerm);
     },
 
-    showScopedLabels(label) {
-      return this.scopedLabelsAvailable && isScopedLabel(label);
+    setSelectedItem(selectedId) {
+      const label = this.labels.find(({ id }) => id === selectedId);
+      if (!selectedId || !label) {
+        this.selectedLabel = null;
+      } else {
+        this.selectedLabel = { ...label };
+      }
     },
   },
 };
@@ -99,38 +92,39 @@ export default {
 <template>
   <board-add-new-column-form
     :loading="labelsLoading"
-    :form-description="__('A label list displays issues with the selected label.')"
-    :search-label="__('Select label')"
+    :none-selected="__('Select a label')"
     :search-placeholder="__('Search labels')"
     :selected-id="selectedId"
     @filter-items="filterItems"
     @add-list="addList"
   >
-    <template slot="selected">
-      <gl-label
-        v-if="selectedLabel"
-        v-gl-tooltip
-        :title="selectedLabel.title"
-        :description="selectedLabel.description"
-        :background-color="selectedLabel.color"
-        :scoped="showScopedLabels(selectedLabel)"
-      />
+    <template #selected>
+      <template v-if="selectedLabel">
+        <span
+          class="dropdown-label-box gl-top-0 gl-flex-shrink-0"
+          :style="{
+            backgroundColor: selectedLabel.color,
+          }"
+        ></span>
+        <div class="gl-text-truncate">{{ selectedLabel.title }}</div>
+      </template>
     </template>
 
-    <template slot="items">
+    <template #items>
       <gl-form-radio-group
         v-if="labels.length > 0"
         v-model="selectedId"
         class="gl-overflow-y-auto gl-px-5 gl-pt-3"
+        @change="setSelectedItem"
       >
         <label
           v-for="label in labels"
           :key="label.id"
-          class="gl-display-flex gl-flex-align-items-center gl-mb-5 gl-font-weight-normal"
+          class="gl-display-flex gl-mb-5 gl-font-weight-normal gl-overflow-break-word"
         >
-          <gl-form-radio :value="label.id" class="gl-mb-0" />
+          <gl-form-radio :value="label.id" />
           <span
-            class="dropdown-label-box gl-top-0"
+            class="dropdown-label-box gl-top-0 gl-flex-shrink-0"
             :style="{
               backgroundColor: label.color,
             }"
diff --git a/app/assets/javascripts/boards/components/board_add_new_column_form.vue b/app/assets/javascripts/boards/components/board_add_new_column_form.vue
index d85343a5390..70ba90bb1d4 100644
--- a/app/assets/javascripts/boards/components/board_add_new_column_form.vue
+++ b/app/assets/javascripts/boards/components/board_add_new_column_form.vue
@@ -1,5 +1,12 @@
 <script>
-import { GlButton, GlFormGroup, GlSearchBoxByType, GlSkeletonLoader } from '@gitlab/ui';
+import {
+  GlButton,
+  GlDropdown,
+  GlFormGroup,
+  GlIcon,
+  GlSearchBoxByType,
+  GlSkeletonLoader,
+} from '@gitlab/ui';
 import { mapActions } from 'vuex';
 import { __ } from '~/locale';
 
@@ -8,13 +15,16 @@ export default {
     add: __('Add to board'),
     cancel: __('Cancel'),
     newList: __('New list'),
-    noneSelected: __('None'),
     noResults: __('No matching results'),
+    scope: __('Scope'),
+    scopeDescription: __('Issues must match this scope to appear in this list.'),
     selected: __('Selected'),
   },
   components: {
     GlButton,
+    GlDropdown,
     GlFormGroup,
+    GlIcon,
     GlSearchBoxByType,
     GlSkeletonLoader,
   },
@@ -23,11 +33,12 @@ export default {
       type: Boolean,
       required: true,
     },
-    formDescription: {
+    searchLabel: {
       type: String,
-      required: true,
+      required: false,
+      default: null,
     },
-    searchLabel: {
+    noneSelected: {
       type: String,
       required: true,
     },
@@ -46,8 +57,23 @@ export default {
       searchValue: '',
     };
   },
+  watch: {
+    selectedId(val) {
+      if (val) {
+        this.$refs.dropdown.hide(true);
+      }
+    },
+  },
   methods: {
     ...mapActions(['setAddColumnFormVisibility']),
+    setFocus() {
+      this.$refs.searchBox.focusInput();
+    },
+    onHide() {
+      this.searchValue = '';
+      this.$emit('filter-items', '');
+      this.$emit('hide');
+    },
   },
 };
 </script>
@@ -62,51 +88,64 @@ export default {
       class="board-inner gl-display-flex gl-flex-direction-column gl-relative gl-h-full gl-rounded-base gl-bg-white"
     >
       <h3
-        class="gl-font-base gl-px-5 gl-py-5 gl-m-0 gl-border-b-1 gl-border-b-solid gl-border-b-gray-100"
+        class="gl-font-size-h2 gl-px-5 gl-py-4 gl-m-0 gl-border-b-1 gl-border-b-solid gl-border-b-gray-100"
         data-testid="board-add-column-form-title"
       >
         {{ $options.i18n.newList }}
       </h3>
 
-      <div class="gl-display-flex gl-flex-direction-column gl-h-full gl-overflow-hidden">
-        <slot name="select-list-type">
-          <div class="gl-mb-5"></div>
-        </slot>
+      <div
+        class="gl-display-flex gl-flex-direction-column gl-h-full gl-overflow-y-auto gl-align-items-flex-start"
+      >
+        <div class="gl-px-5">
+          <h3 class="gl-font-lg gl-mt-5 gl-mb-2">
+            {{ $options.i18n.scope }}
+          </h3>
+          <p class="gl-mb-3">{{ $options.i18n.scopeDescription }}</p>
+        </div>
 
-        <p class="gl-px-5">{{ formDescription }}</p>
+        <slot name="select-list-type"></slot>
 
-        <div class="gl-px-5 gl-pb-4">
-          <label class="gl-mb-2">{{ $options.i18n.selected }}</label>
-          <slot name="selected">
-            <div class="gl-text-gray-500">{{ $options.i18n.noneSelected }}</div>
-          </slot>
-        </div>
+        <gl-form-group class="gl-px-5 lg-mb-3 gl-max-w-full" :label="searchLabel">
+          <gl-dropdown
+            ref="dropdown"
+            class="gl-mb-3 gl-max-w-full"
+            toggle-class="gl-max-w-full gl-display-flex gl-align-items-center gl-text-trunate"
+            boundary="viewport"
+            @shown="setFocus"
+            @hide="onHide"
+          >
+            <template #button-content>
+              <slot name="selected">
+                <div>{{ noneSelected }}</div>
+              </slot>
+              <gl-icon class="dropdown-chevron gl-flex-shrink-0" name="chevron-down" />
+            </template>
 
-        <gl-form-group
-          class="gl-mx-5 gl-mb-3"
-          :label="searchLabel"
-          label-for="board-available-column-entities"
-        >
-          <gl-search-box-by-type
-            id="board-available-column-entities"
-            v-model="searchValue"
-            debounce="250"
-            :placeholder="searchPlaceholder"
-            @input="$emit('filter-items', $event)"
-          />
-        </gl-form-group>
+            <template #header>
+              <gl-search-box-by-type
+                ref="searchBox"
+                v-model="searchValue"
+                debounce="250"
+                class="gl-mt-0!"
+                :placeholder="searchPlaceholder"
+                @input="$emit('filter-items', $event)"
+              />
+            </template>
 
-        <div v-if="loading" class="gl-px-5">
-          <gl-skeleton-loader :width="500" :height="172">
-            <rect width="480" height="20" x="10" y="15" rx="4" />
-            <rect width="380" height="20" x="10" y="50" rx="4" />
-            <rect width="430" height="20" x="10" y="85" rx="4" />
-          </gl-skeleton-loader>
-        </div>
+            <div v-if="loading" class="gl-px-5">
+              <gl-skeleton-loader :width="400" :height="172">
+                <rect width="380" height="20" x="10" y="15" rx="4" />
+                <rect width="280" height="20" x="10" y="50" rx="4" />
+                <rect width="330" height="20" x="10" y="85" rx="4" />
+              </gl-skeleton-loader>
+            </div>
 
-        <slot v-else name="items">
-          <p class="gl-mx-5">{{ $options.i18n.noResults }}</p>
-        </slot>
+            <slot v-else name="items">
+              <p class="gl-mx-5">{{ $options.i18n.noResults }}</p>
+            </slot>
+          </gl-dropdown>
+        </gl-form-group>
       </div>
       <div
         class="gl-display-flex gl-p-3 gl-border-t-1 gl-border-t-solid gl-border-gray-100 gl-bg-gray-10 gl-rounded-bottom-left-base gl-rounded-bottom-right-base"
diff --git a/app/assets/javascripts/boards/components/board_add_new_column_trigger.vue b/app/assets/javascripts/boards/components/board_add_new_column_trigger.vue
index 7c08e33be7e..85f001d9d61 100644
--- a/app/assets/javascripts/boards/components/board_add_new_column_trigger.vue
+++ b/app/assets/javascripts/boards/components/board_add_new_column_trigger.vue
@@ -13,9 +13,9 @@ export default {
 </script>
 
 <template>
-  <span class="gl-ml-3 gl-display-flex gl-align-items-center" data-testid="boards-create-list">
+  <div class="gl-ml-3 gl-display-flex gl-align-items-center" data-testid="boards-create-list">
     <gl-button variant="confirm" @click="setAddColumnFormVisibility(true)"
       >{{ __('Create list') }}
     </gl-button>
-  </span>
+  </div>
 </template>
diff --git a/app/assets/javascripts/boards/components/board_blocked_icon.vue b/app/assets/javascripts/boards/components/board_blocked_icon.vue
new file mode 100644
index 00000000000..0f92e714752
--- /dev/null
+++ b/app/assets/javascripts/boards/components/board_blocked_icon.vue
@@ -0,0 +1,192 @@
+<script>
+import { GlIcon, GlLink, GlPopover, GlLoadingIcon } from '@gitlab/ui';
+import { blockingIssuablesQueries, issuableTypes } from '~/boards/constants';
+import { IssueType } from '~/graphql_shared/constants';
+import { convertToGraphQLId } from '~/graphql_shared/utils';
+import { truncate } from '~/lib/utils/text_utility';
+import { __, n__, s__, sprintf } from '~/locale';
+
+export default {
+  i18n: {
+    issuableType: {
+      [issuableTypes.issue]: __('issue'),
+    },
+  },
+  graphQLIdType: {
+    [issuableTypes.issue]: IssueType,
+  },
+  referenceFormatter: {
+    [issuableTypes.issue]: (r) => r.split('/')[1],
+  },
+  defaultDisplayLimit: 3,
+  textTruncateWidth: 80,
+  components: {
+    GlIcon,
+    GlPopover,
+    GlLink,
+    GlLoadingIcon,
+  },
+  blockingIssuablesQueries,
+  props: {
+    item: {
+      type: Object,
+      required: true,
+    },
+    uniqueId: {
+      type: String,
+      required: true,
+    },
+    issuableType: {
+      type: String,
+      required: true,
+      validator(value) {
+        return [issuableTypes.issue].includes(value);
+      },
+    },
+  },
+  apollo: {
+    blockingIssuables: {
+      skip() {
+        return this.skip;
+      },
+      query() {
+        return blockingIssuablesQueries[this.issuableType].query;
+      },
+      variables() {
+        return {
+          id: convertToGraphQLId(this.$options.graphQLIdType[this.issuableType], this.item.id),
+        };
+      },
+      update(data) {
+        this.skip = true;
+
+        return data?.issuable?.blockingIssuables?.nodes || [];
+      },
+      error(error) {
+        const message = sprintf(s__('Boards|Failed to fetch blocking %{issuableType}s'), {
+          issuableType: this.issuableTypeText,
+        });
+        this.$emit('blocking-issuables-error', { error, message });
+      },
+    },
+  },
+  data() {
+    return {
+      skip: true,
+      blockingIssuables: [],
+    };
+  },
+  computed: {
+    displayedIssuables() {
+      const { defaultDisplayLimit, referenceFormatter } = this.$options;
+      return this.blockingIssuables.slice(0, defaultDisplayLimit).map((i) => {
+        return {
+          ...i,
+          title: truncate(i.title, this.$options.textTruncateWidth),
+          reference: referenceFormatter[this.issuableType](i.reference),
+        };
+      });
+    },
+    loading() {
+      return this.$apollo.queries.blockingIssuables.loading;
+    },
+    issuableTypeText() {
+      return this.$options.i18n.issuableType[this.issuableType];
+    },
+    blockedLabel() {
+      return sprintf(
+        n__(
+          'Boards|Blocked by %{blockedByCount} %{issuableType}',
+          'Boards|Blocked by %{blockedByCount} %{issuableType}s',
+          this.item.blockedByCount,
+        ),
+        {
+          blockedByCount: this.item.blockedByCount,
+          issuableType: this.issuableTypeText,
+        },
+      );
+    },
+    glIconId() {
+      return `blocked-icon-${this.uniqueId}`;
+    },
+    hasMoreIssuables() {
+      return this.item.blockedByCount > this.$options.defaultDisplayLimit;
+    },
+    displayedIssuablesCount() {
+      return this.hasMoreIssuables
+        ? this.item.blockedByCount - this.$options.defaultDisplayLimit
+        : this.item.blockedByCount;
+    },
+    moreIssuablesText() {
+      return sprintf(
+        n__(
+          'Boards|+ %{displayedIssuablesCount} more %{issuableType}',
+          'Boards|+ %{displayedIssuablesCount} more %{issuableType}s',
+          this.displayedIssuablesCount,
+        ),
+        {
+          displayedIssuablesCount: this.displayedIssuablesCount,
+          issuableType: this.issuableTypeText,
+        },
+      );
+    },
+    viewAllIssuablesText() {
+      return sprintf(s__('Boards|View all blocking %{issuableType}s'), {
+        issuableType: this.issuableTypeText,
+      });
+    },
+    loadingMessage() {
+      return sprintf(s__('Boards|Retrieving blocking %{issuableType}s'), {
+        issuableType: this.issuableTypeText,
+      });
+    },
+  },
+  methods: {
+    handleMouseEnter() {
+      this.skip = false;
+    },
+  },
+};
+</script>
+<template>
+  <div class="gl-display-inline">
+    <gl-icon
+      :id="glIconId"
+      ref="icon"
+      name="issue-block"
+      class="issue-blocked-icon gl-mr-2 gl-cursor-pointer"
+      data-testid="issue-blocked-icon"
+      @mouseenter="handleMouseEnter"
+    />
+    <gl-popover :target="glIconId" placement="top">
+      <template #title
+        ><span data-testid="popover-title">{{ blockedLabel }}</span></template
+      >
+      <template v-if="loading">
+        <gl-loading-icon />
+        <p class="gl-mt-4 gl-mb-0 gl-font-small">{{ loadingMessage }}</p>
+      </template>
+      <template v-else>
+        <ul class="gl-list-style-none gl-p-0">
+          <li v-for="issuable in displayedIssuables" :key="issuable.id">
+            <gl-link :href="issuable.webUrl" class="gl-text-blue-500! gl-font-sm">{{
+              issuable.reference
+            }}</gl-link>
+            <p class="gl-mb-3 gl-display-block!" data-testid="issuable-title">
+              {{ issuable.title }}
+            </p>
+          </li>
+        </ul>
+        <div v-if="hasMoreIssuables" class="gl-mt-4">
+          <p class="gl-mb-3" data-testid="hidden-blocking-count">{{ moreIssuablesText }}</p>
+          <gl-link
+            data-testid="view-all-issues"
+            :href="`${item.webUrl}#related-issues`"
+            class="gl-text-blue-500! gl-font-sm"
+            >{{ viewAllIssuablesText }}</gl-link
+          >
+        </div>
+      </template>
+    </gl-popover>
+  </div>
+</template>
diff --git a/app/assets/javascripts/boards/components/board_card_inner.vue b/app/assets/javascripts/boards/components/board_card_inner.vue
index d4d6b17a589..9ff2cdd76d0 100644
--- a/app/assets/javascripts/boards/components/board_card_inner.vue
+++ b/app/assets/javascripts/boards/components/board_card_inner.vue
@@ -10,6 +10,7 @@ import TooltipOnTruncate from '~/vue_shared/components/tooltip_on_truncate.vue';
 import UserAvatarLink from '../../vue_shared/components/user_avatar/user_avatar_link.vue';
 import { ListType } from '../constants';
 import eventHub from '../eventhub';
+import BoardBlockedIcon from './board_blocked_icon.vue';
 import IssueDueDate from './issue_due_date.vue';
 import IssueTimeEstimate from './issue_time_estimate.vue';
 
@@ -22,6 +23,7 @@ export default {
     IssueDueDate,
     IssueTimeEstimate,
     IssueCardWeight: () => import('ee_component/boards/components/issue_card_weight.vue'),
+    BoardBlockedIcon,
   },
   directives: {
     GlTooltip: GlTooltipDirective,
@@ -52,7 +54,7 @@ export default {
     };
   },
   computed: {
-    ...mapState(['isShowingLabels']),
+    ...mapState(['isShowingLabels', 'issuableType']),
     ...mapGetters(['isEpicBoard']),
     cappedAssignees() {
       // e.g. maxRender is 4,
@@ -114,7 +116,7 @@ export default {
     },
   },
   methods: {
-    ...mapActions(['performSearch']),
+    ...mapActions(['performSearch', 'setError']),
     isIndexLessThanlimit(index) {
       return index < this.limitBeforeCounter;
     },
@@ -164,14 +166,12 @@ export default {
   <div>
     <div class="gl-display-flex" dir="auto">
       <h4 class="board-card-title gl-mb-0 gl-mt-0">
-        <gl-icon
+        <board-blocked-icon
           v-if="item.blocked"
-          v-gl-tooltip
-          name="issue-block"
-          :title="blockedLabel"
-          class="issue-blocked-icon gl-mr-2"
-          :aria-label="blockedLabel"
-          data-testid="issue-blocked-icon"
+          :item="item"
+          :unique-id="`${item.id}${list.id}`"
+          :issuable-type="issuableType"
+          @blocking-issuables-error="setError"
         />
         <gl-icon
           v-if="item.confidential"
@@ -181,13 +181,9 @@ export default {
           class="confidential-icon gl-mr-2"
           :aria-label="__('Confidential')"
         />
-        <a
-          :href="item.path || item.webUrl || ''"
-          :title="item.title"
-          class="js-no-trigger"
-          @mousemove.stop
-          >{{ item.title }}</a
-        >
+        <a :href="item.path || item.webUrl || ''" :title="item.title" @mousemove.stop>{{
+          item.title
+        }}</a>
       </h4>
     </div>
     <div v-if="showLabelFooter" class="board-card-labels gl-mt-2 gl-display-flex gl-flex-wrap">
diff --git a/app/assets/javascripts/boards/components/board_card_loading_skeleton.vue b/app/assets/javascripts/boards/components/board_card_loading_skeleton.vue
new file mode 100644
index 00000000000..15bff1226a6
--- /dev/null
+++ b/app/assets/javascripts/boards/components/board_card_loading_skeleton.vue
@@ -0,0 +1,26 @@
+<script>
+import { GlSkeletonLoader } from '@gitlab/ui';
+
+export default {
+  name: 'BoardCardLoading',
+  components: {
+    GlSkeletonLoader,
+  },
+};
+</script>
+
+<template>
+  <div
+    class="board-card-skeleton gl-mb-3 gl-bg-white gl-rounded-base gl-p-5 gl-border-1 gl-border-solid gl-border-gray-50"
+  >
+    <div class="board-card-skeleton-inner">
+      <gl-skeleton-loader :width="340" :height="100">
+        <rect width="340" height="16" rx="4" />
+        <rect y="30" width="118" height="16" rx="8" />
+        <rect x="122" y="30" width="130" height="16" rx="8" />
+        <rect y="62" width="38" height="16" rx="4" />
+        <circle cx="320" cy="68" r="16" />
+      </gl-skeleton-loader>
+    </div>
+  </div>
+</template>
diff --git a/app/assets/javascripts/boards/components/board_content.vue b/app/assets/javascripts/boards/components/board_content.vue
index e9c4237d759..a4b1e6adacf 100644
--- a/app/assets/javascripts/boards/components/board_content.vue
+++ b/app/assets/javascripts/boards/components/board_content.vue
@@ -17,21 +17,20 @@ export default {
       gon.features?.graphqlBoardLists || gon.features?.epicBoards
         ? BoardColumn
         : BoardColumnDeprecated,
-    BoardContentSidebar: () => import('ee_component/boards/components/board_content_sidebar.vue'),
+    BoardContentSidebar: () => import('~/boards/components/board_content_sidebar.vue'),
+    EpicBoardContentSidebar: () =>
+      import('ee_component/boards/components/epic_board_content_sidebar.vue'),
     EpicsSwimlanes: () => import('ee_component/boards/components/epics_swimlanes.vue'),
     GlAlert,
   },
   mixins: [glFeatureFlagMixin()],
+  inject: ['canAdminList'],
   props: {
     lists: {
       type: Array,
       required: false,
       default: () => [],
     },
-    canAdminList: {
-      type: Boolean,
-      required: true,
-    },
     disabled: {
       type: Boolean,
       required: true,
@@ -69,7 +68,7 @@ export default {
     },
   },
   methods: {
-    ...mapActions(['moveList']),
+    ...mapActions(['moveList', 'unsetError']),
     afterFormEnters() {
       const el = this.canDragColumns ? this.$refs.list.$el : this.$refs.list;
       el.scrollTo({ left: el.scrollWidth, behavior: 'smooth' });
@@ -99,8 +98,8 @@ export default {
 </script>
 
 <template>
-  <div>
-    <gl-alert v-if="error" variant="danger" :dismissible="false">
+  <div v-cloak data-qa-selector="boards_list">
+    <gl-alert v-if="error" variant="danger" :dismissible="true" @dismiss="unsetError">
       {{ error }}
     </gl-alert>
     <component
@@ -127,13 +126,23 @@ export default {
     </component>
 
     <epics-swimlanes
-      v-else
+      v-else-if="boardListsToUse.length"
       ref="swimlanes"
       :lists="boardListsToUse"
       :can-admin-list="canAdminList"
       :disabled="disabled"
     />
 
-    <board-content-sidebar v-if="isSwimlanesOn || glFeatures.graphqlBoardLists" />
+    <board-content-sidebar
+      v-if="isSwimlanesOn || glFeatures.graphqlBoardLists"
+      class="boards-sidebar"
+      data-testid="issue-boards-sidebar"
+    />
+
+    <epic-board-content-sidebar
+      v-else-if="isEpicBoard"
+      class="boards-sidebar"
+      data-testid="epic-boards-sidebar"
+    />
   </div>
 </template>
diff --git a/app/assets/javascripts/boards/components/board_content_sidebar.vue b/app/assets/javascripts/boards/components/board_content_sidebar.vue
new file mode 100644
index 00000000000..46359cc2bca
--- /dev/null
+++ b/app/assets/javascripts/boards/components/board_content_sidebar.vue
@@ -0,0 +1,96 @@
+<script>
+import { GlDrawer } from '@gitlab/ui';
+import { mapState, mapActions, mapGetters } from 'vuex';
+import BoardSidebarDueDate from '~/boards/components/sidebar/board_sidebar_due_date.vue';
+import BoardSidebarLabelsSelect from '~/boards/components/sidebar/board_sidebar_labels_select.vue';
+import BoardSidebarMilestoneSelect from '~/boards/components/sidebar/board_sidebar_milestone_select.vue';
+import BoardSidebarSubscription from '~/boards/components/sidebar/board_sidebar_subscription.vue';
+import BoardSidebarTimeTracker from '~/boards/components/sidebar/board_sidebar_time_tracker.vue';
+import BoardSidebarTitle from '~/boards/components/sidebar/board_sidebar_title.vue';
+import { ISSUABLE } from '~/boards/constants';
+import { contentTop } from '~/lib/utils/common_utils';
+import SidebarAssigneesWidget from '~/sidebar/components/assignees/sidebar_assignees_widget.vue';
+import glFeatureFlagsMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
+
+export default {
+  headerHeight: `${contentTop()}px`,
+  components: {
+    GlDrawer,
+    BoardSidebarTitle,
+    SidebarAssigneesWidget,
+    BoardSidebarTimeTracker,
+    BoardSidebarLabelsSelect,
+    BoardSidebarDueDate,
+    BoardSidebarSubscription,
+    BoardSidebarMilestoneSelect,
+    BoardSidebarEpicSelect: () =>
+      import('ee_component/boards/components/sidebar/board_sidebar_epic_select.vue'),
+    BoardSidebarWeightInput: () =>
+      import('ee_component/boards/components/sidebar/board_sidebar_weight_input.vue'),
+    SidebarIterationWidget: () =>
+      import('ee_component/sidebar/components/sidebar_iteration_widget.vue'),
+  },
+  mixins: [glFeatureFlagsMixin()],
+  computed: {
+    ...mapGetters([
+      'isSidebarOpen',
+      'activeBoardItem',
+      'groupPathForActiveIssue',
+      'projectPathForActiveIssue',
+    ]),
+    ...mapState(['sidebarType', 'issuableType']),
+    isIssuableSidebar() {
+      return this.sidebarType === ISSUABLE;
+    },
+    showSidebar() {
+      return this.isIssuableSidebar && this.isSidebarOpen;
+    },
+    fullPath() {
+      return this.activeBoardItem?.referencePath?.split('#')[0] || '';
+    },
+  },
+  methods: {
+    ...mapActions(['toggleBoardItem', 'setAssignees']),
+    handleClose() {
+      this.toggleBoardItem({ boardItem: this.activeBoardItem, sidebarType: this.sidebarType });
+    },
+  },
+};
+</script>
+
+<template>
+  <gl-drawer
+    v-if="showSidebar"
+    :open="isSidebarOpen"
+    :header-height="$options.headerHeight"
+    @close="handleClose"
+  >
+    <template #header>{{ __('Issue details') }}</template>
+    <template #default>
+      <board-sidebar-title />
+      <sidebar-assignees-widget
+        :iid="activeBoardItem.iid"
+        :full-path="fullPath"
+        :initial-assignees="activeBoardItem.assignees"
+        class="assignee"
+        @assignees-updated="setAssignees"
+      />
+      <board-sidebar-epic-select class="epic" />
+      <div>
+        <board-sidebar-milestone-select />
+        <sidebar-iteration-widget
+          :iid="activeBoardItem.iid"
+          :workspace-path="projectPathForActiveIssue"
+          :iterations-workspace-path="groupPathForActiveIssue"
+          :issuable-type="issuableType"
+          class="gl-mt-5"
+        />
+      </div>
+      <board-sidebar-time-tracker class="swimlanes-sidebar-time-tracker" />
+      <board-sidebar-due-date />
+      <board-sidebar-labels-select class="labels" />
+      <board-sidebar-weight-input v-if="glFeatures.issueWeights" class="weight" />
+      <board-sidebar-subscription class="subscriptions" />
+    </template>
+  </gl-drawer>
+</template>
diff --git a/app/assets/javascripts/boards/components/board_extra_actions.vue b/app/assets/javascripts/boards/components/board_extra_actions.vue
deleted file mode 100644
index b802ccc7882..00000000000
--- a/app/assets/javascripts/boards/components/board_extra_actions.vue
+++ /dev/null
@@ -1,57 +0,0 @@
-<script>
-import { GlTooltip, GlButton } from '@gitlab/ui';
-import { __ } from '~/locale';
-
-export default {
-  name: 'BoardExtraActions',
-  components: {
-    GlTooltip,
-    GlButton,
-  },
-  props: {
-    canAdminList: {
-      type: Boolean,
-      required: true,
-    },
-    disabled: {
-      type: Boolean,
-      required: true,
-    },
-    openModal: {
-      type: Function,
-      required: true,
-    },
-  },
-  computed: {
-    tooltipTitle() {
-      if (this.disabled) {
-        return __('Please add a list to your board first');
-      }
-
-      return '';
-    },
-  },
-};
-</script>
-
-<template>
-  <div class="board-extra-actions">
-    <span ref="addIssuesButtonTooltip" class="gl-ml-3">
-      <gl-button
-        v-if="canAdminList"
-        type="button"
-        data-placement="bottom"
-        data-track-event="click_button"
-        data-track-label="board_add_issues"
-        :disabled="disabled"
-        :aria-disabled="disabled"
-        @click="openModal"
-      >
-        {{ __('Add issues') }}
-      </gl-button>
-    </span>
-    <gl-tooltip v-if="disabled" :target="() => $refs.addIssuesButtonTooltip" placement="bottom">
-      {{ tooltipTitle }}
-    </gl-tooltip>
-  </div>
-</template>
diff --git a/app/assets/javascripts/boards/components/board_form.vue b/app/assets/javascripts/boards/components/board_form.vue
index d8504dcfb0f..78da4137d69 100644
--- a/app/assets/javascripts/boards/components/board_form.vue
+++ b/app/assets/javascripts/boards/components/board_form.vue
@@ -107,7 +107,7 @@ export default {
     };
   },
   computed: {
-    ...mapGetters(['isEpicBoard', 'isGroupBoard', 'isProjectBoard']),
+    ...mapGetters(['isIssueBoard', 'isGroupBoard', 'isProjectBoard']),
     isNewForm() {
       return this.currentPage === formType.new;
     },
@@ -127,7 +127,7 @@ export default {
       if (this.isDeleteForm) {
         return 'danger';
       }
-      return 'info';
+      return 'confirm';
     },
     title() {
       if (this.readonly) {
@@ -163,6 +163,9 @@ export default {
     currentMutation() {
       return this.board.id ? updateBoardMutation : createBoardMutation;
     },
+    deleteMutation() {
+      return destroyBoardMutation;
+    },
     baseMutationVariables() {
       const { board } = this;
       const variables = {
@@ -182,7 +185,7 @@ export default {
             groupPath: this.isGroupBoard ? this.fullPath : undefined,
           };
     },
-    boardScopeMutationVariables() {
+    issueBoardScopeMutationVariables() {
       /* eslint-disable @gitlab/require-i18n-strings */
       return {
         weight: this.board.weight,
@@ -193,13 +196,18 @@ export default {
           this.board.milestone?.id || this.board.milestone?.id === 0
             ? convertToGraphQLId('Milestone', this.board.milestone.id)
             : null,
-        labelIds: this.board.labels.map(fullLabelId),
         iterationId: this.board.iteration_id
           ? convertToGraphQLId('Iteration', this.board.iteration_id)
           : null,
       };
       /* eslint-enable @gitlab/require-i18n-strings */
     },
+    boardScopeMutationVariables() {
+      return {
+        labelIds: this.board.labels.map(fullLabelId),
+        ...(this.isIssueBoard && this.issueBoardScopeMutationVariables),
+      };
+    },
     mutationVariables() {
       return {
         ...this.baseMutationVariables,
@@ -239,17 +247,20 @@ export default {
 
       return this.boardUpdateResponse(response.data);
     },
+    async deleteBoard() {
+      await this.$apollo.mutate({
+        mutation: this.deleteMutation,
+        variables: {
+          id: fullBoardId(this.board.id),
+        },
+      });
+    },
     async submit() {
       if (this.board.name.length === 0) return;
       this.isLoading = true;
       if (this.isDeleteForm) {
         try {
-          await this.$apollo.mutate({
-            mutation: destroyBoardMutation,
-            variables: {
-              id: fullBoardId(this.board.id),
-            },
-          });
+          await this.deleteBoard();
           visitUrl(this.rootPath);
         } catch {
           Flash(this.$options.i18n.deleteErrorMessage);
@@ -324,7 +335,7 @@ export default {
       />
 
       <board-scope
-        v-if="scopedIssueBoardFeatureEnabled && !isEpicBoard"
+        v-if="scopedIssueBoardFeatureEnabled"
         :collapse-scope="isNewForm"
         :board="board"
         :can-admin-board="canAdminBoard"
diff --git a/app/assets/javascripts/boards/components/board_list.vue b/app/assets/javascripts/boards/components/board_list.vue
index ae8434be312..94e29f3ad86 100644
--- a/app/assets/javascripts/boards/components/board_list.vue
+++ b/app/assets/javascripts/boards/components/board_list.vue
@@ -190,7 +190,7 @@ export default {
       }
 
       this.moveItem({
-        itemId,
+        itemId: Number(itemId),
         itemIid,
         itemPath,
         fromListId: from.dataset.listId,
diff --git a/app/assets/javascripts/boards/components/board_list_deprecated.vue b/app/assets/javascripts/boards/components/board_list_deprecated.vue
index d59fbcc1b31..0534e027c86 100644
--- a/app/assets/javascripts/boards/components/board_list_deprecated.vue
+++ b/app/assets/javascripts/boards/components/board_list_deprecated.vue
@@ -134,9 +134,10 @@ export default {
               e.target.closest('.js-board-list') || e.target.querySelector('.js-board-list');
             const toBoardType = containerEl.dataset.boardType;
             const cloneActions = {
-              label: ['milestone', 'assignee'],
-              assignee: ['milestone', 'label'],
-              milestone: ['label', 'assignee'],
+              label: ['milestone', 'assignee', 'iteration'],
+              assignee: ['milestone', 'label', 'iteration'],
+              milestone: ['label', 'assignee', 'iteration'],
+              iteration: ['label', 'assignee', 'milestone'],
             };
 
             if (toBoardType) {
diff --git a/app/assets/javascripts/boards/components/board_list_header.vue b/app/assets/javascripts/boards/components/board_list_header.vue
index 6ccaec4a633..ca66ad6934a 100644
--- a/app/assets/javascripts/boards/components/board_list_header.vue
+++ b/app/assets/javascripts/boards/components/board_list_header.vue
@@ -328,6 +328,7 @@ export default {
 
       <div
         class="issue-count-badge gl-display-inline-flex gl-pr-0 no-drag gl-text-gray-500"
+        data-testid="issue-count-badge"
         :class="{
           'gl-display-none!': list.collapsed && isSwimlanesHeader,
           'gl-p-0': list.collapsed,
diff --git a/app/assets/javascripts/boards/components/board_new_issue.vue b/app/assets/javascripts/boards/components/board_new_issue.vue
index a81c28733cd..144cae15ab3 100644
--- a/app/assets/javascripts/boards/components/board_new_issue.vue
+++ b/app/assets/javascripts/boards/components/board_new_issue.vue
@@ -2,23 +2,23 @@
 import { GlButton } from '@gitlab/ui';
 import { mapActions, mapGetters, mapState } from 'vuex';
 import { getMilestone } from 'ee_else_ce/boards/boards_util';
+import BoardNewIssueMixin from 'ee_else_ce/boards/mixins/board_new_issue';
 import { __ } from '~/locale';
-import glFeatureFlagMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 import eventHub from '../eventhub';
 import ProjectSelect from './project_select.vue';
 
 export default {
   name: 'BoardNewIssue',
   i18n: {
-    submit: __('Submit issue'),
+    submit: __('Create issue'),
     cancel: __('Cancel'),
   },
   components: {
     ProjectSelect,
     GlButton,
   },
-  mixins: [glFeatureFlagMixin()],
-  inject: ['groupId', 'weightFeatureAvailable', 'boardWeight'],
+  mixins: [BoardNewIssueMixin],
+  inject: ['groupId'],
   props: {
     list: {
       type: Object,
@@ -53,14 +53,11 @@ export default {
     submit(e) {
       e.preventDefault();
 
+      const { title } = this;
       const labels = this.list.label ? [this.list.label] : [];
       const assignees = this.list.assignee ? [this.list.assignee] : [];
       const milestone = getMilestone(this.list);
 
-      const weight = this.weightFeatureAvailable ? this.boardWeight : undefined;
-
-      const { title } = this;
-
       eventHub.$emit(`scroll-board-list-${this.list.id}`);
 
       return this.addListNewIssue({
@@ -70,7 +67,7 @@ export default {
           assigneeIds: assignees?.map((a) => a?.id),
           milestoneId: milestone?.id,
           projectPath: this.selectedProject.fullPath,
-          weight: weight >= 0 ? weight : null,
+          ...this.extraIssueInput(),
         },
         list: this.list,
       }).then(() => {
diff --git a/app/assets/javascripts/boards/components/board_new_issue_deprecated.vue b/app/assets/javascripts/boards/components/board_new_issue_deprecated.vue
index 16f23dfff0e..1218941065f 100644
--- a/app/assets/javascripts/boards/components/board_new_issue_deprecated.vue
+++ b/app/assets/javascripts/boards/components/board_new_issue_deprecated.vue
@@ -121,7 +121,7 @@ export default {
             variant="success"
             category="primary"
             type="submit"
-            >{{ __('Submit issue') }}</gl-button
+            >{{ __('Create issue') }}</gl-button
           >
           <gl-button
             ref="cancelButton"
diff --git a/app/assets/javascripts/boards/components/board_settings_sidebar.vue b/app/assets/javascripts/boards/components/board_settings_sidebar.vue
index 7cfedad0aed..997655c346a 100644
--- a/app/assets/javascripts/boards/components/board_settings_sidebar.vue
+++ b/app/assets/javascripts/boards/components/board_settings_sidebar.vue
@@ -22,13 +22,7 @@ export default {
       import('ee_component/boards/components/board_settings_list_types.vue'),
   },
   mixins: [glFeatureFlagMixin()],
-  props: {
-    canAdminList: {
-      type: Boolean,
-      required: false,
-      default: false,
-    },
-  },
+  inject: ['canAdminList'],
   data() {
     return {
       ListType,
diff --git a/app/assets/javascripts/boards/components/config_toggle.vue b/app/assets/javascripts/boards/components/config_toggle.vue
index 7ec99e51f5b..fdb60d0ae6a 100644
--- a/app/assets/javascripts/boards/components/config_toggle.vue
+++ b/app/assets/javascripts/boards/components/config_toggle.vue
@@ -15,7 +15,8 @@ export default {
   props: {
     boardsStore: {
       type: Object,
-      required: true,
+      required: false,
+      default: null,
     },
     canAdminList: {
       type: Boolean,
@@ -26,11 +27,6 @@ export default {
       required: true,
     },
   },
-  data() {
-    return {
-      state: this.boardsStore.state,
-    };
-  },
   computed: {
     buttonText() {
       return this.canAdminList ? s__('Boards|Edit board') : s__('Boards|View scope');
@@ -42,7 +38,9 @@ export default {
   methods: {
     showPage() {
       eventHub.$emit('showBoardModal', formType.edit);
-      return this.boardsStore.showPage(formType.edit);
+      if (this.boardsStore) {
+        this.boardsStore.showPage(formType.edit);
+      }
     },
   },
 };
diff --git a/app/assets/javascripts/boards/components/filtered_search.vue b/app/assets/javascripts/boards/components/filtered_search.vue
deleted file mode 100644
index 8505ea39a6b..00000000000
--- a/app/assets/javascripts/boards/components/filtered_search.vue
+++ /dev/null
@@ -1,54 +0,0 @@
-<script>
-import { mapActions } from 'vuex';
-import { historyPushState } from '~/lib/utils/common_utils';
-import { setUrlParams } from '~/lib/utils/url_utility';
-import { __ } from '~/locale';
-import FilteredSearch from '~/vue_shared/components/filtered_search_bar/filtered_search_bar_root.vue';
-
-export default {
-  i18n: {
-    search: __('Search'),
-  },
-  components: { FilteredSearch },
-  props: {
-    search: {
-      type: String,
-      required: false,
-      default: '',
-    },
-  },
-  computed: {
-    initialSearch() {
-      return [{ type: 'filtered-search-term', value: { data: this.search } }];
-    },
-  },
-  methods: {
-    ...mapActions(['performSearch']),
-    handleSearch(filters) {
-      let itemValue = '';
-      const [item] = filters;
-
-      if (filters.length === 0) {
-        itemValue = '';
-      } else {
-        itemValue = item?.value?.data;
-      }
-
-      historyPushState(setUrlParams({ search: itemValue }, window.location.href));
-
-      this.performSearch();
-    },
-  },
-};
-</script>
-
-<template>
-  <filtered-search
-    class="gl-w-full"
-    namespace=""
-    :tokens="[]"
-    :search-input-placeholder="$options.i18n.search"
-    :initial-filter-value="initialSearch"
-    @onFilter="handleSearch"
-  />
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/empty_state.vue b/app/assets/javascripts/boards/components/modal/empty_state.vue
deleted file mode 100644
index 486b012e3d2..00000000000
--- a/app/assets/javascripts/boards/components/modal/empty_state.vue
+++ /dev/null
@@ -1,84 +0,0 @@
-<script>
-import { GlButton, GlSprintf } from '@gitlab/ui';
-import { __ } from '~/locale';
-import modalMixin from '../../mixins/modal_mixins';
-import ModalStore from '../../stores/modal_store';
-
-export default {
-  components: {
-    GlButton,
-    GlSprintf,
-  },
-  mixins: [modalMixin],
-  props: {
-    newIssuePath: {
-      type: String,
-      required: true,
-    },
-    emptyStateSvg: {
-      type: String,
-      required: true,
-    },
-  },
-  data() {
-    return ModalStore.store;
-  },
-  computed: {
-    contents() {
-      const obj = {
-        title: __("You haven't added any issues to your project yet"),
-        content: __(
-          'An issue can be a bug, a todo or a feature request that needs to be discussed in a project. Besides, issues are searchable and filterable.',
-        ),
-      };
-
-      if (this.activeTab === 'selected') {
-        obj.title = __("You haven't selected any issues yet");
-        obj.content = __(
-          'Go back to %{tagStart}Open issues%{tagEnd} and select some issues to add to your board.',
-        );
-      }
-
-      return obj;
-    },
-  },
-};
-</script>
-
-<template>
-  <section class="empty-state d-flex mt-0 h-100">
-    <div class="row w-100 my-auto mx-0">
-      <div class="col-12 col-md-6 order-md-last">
-        <aside class="svg-content d-none d-md-block"><img :src="emptyStateSvg" /></aside>
-      </div>
-      <div class="col-12 col-md-6 order-md-first">
-        <div class="text-content">
-          <h4>{{ contents.title }}</h4>
-          <p>
-            <gl-sprintf :message="contents.content">
-              <template #tag="{ content }">
-                <strong>{{ content }}</strong>
-              </template>
-            </gl-sprintf>
-          </p>
-          <gl-button
-            v-if="activeTab === 'all'"
-            :href="newIssuePath"
-            category="secondary"
-            variant="success"
-          >
-            {{ __('New issue') }}
-          </gl-button>
-          <gl-button
-            v-if="activeTab === 'selected'"
-            category="primary"
-            variant="default"
-            @click="changeTab('all')"
-          >
-            {{ __('Open issues') }}
-          </gl-button>
-        </div>
-      </div>
-    </div>
-  </section>
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/filters.js b/app/assets/javascripts/boards/components/modal/filters.js
deleted file mode 100644
index 2fb38a549f3..00000000000
--- a/app/assets/javascripts/boards/components/modal/filters.js
+++ /dev/null
@@ -1,27 +0,0 @@
-import FilteredSearchContainer from '../../../filtered_search/container';
-import FilteredSearchBoards from '../../filtered_search_boards';
-
-export default {
-  name: 'modal-filters',
-  props: {
-    store: {
-      type: Object,
-      required: true,
-    },
-  },
-  mounted() {
-    FilteredSearchContainer.container = this.$el;
-
-    this.filteredSearch = new FilteredSearchBoards(this.store);
-    this.filteredSearch.setup();
-    this.filteredSearch.removeTokens();
-    this.filteredSearch.handleInputPlaceholder();
-    this.filteredSearch.toggleClearSearchButton();
-  },
-  destroyed() {
-    this.filteredSearch.cleanup();
-    FilteredSearchContainer.container = document;
-    this.store.path = '';
-  },
-  template: '#js-board-modal-filter',
-};
diff --git a/app/assets/javascripts/boards/components/modal/footer.vue b/app/assets/javascripts/boards/components/modal/footer.vue
deleted file mode 100644
index 05e1219bc70..00000000000
--- a/app/assets/javascripts/boards/components/modal/footer.vue
+++ /dev/null
@@ -1,80 +0,0 @@
-<script>
-import { GlButton } from '@gitlab/ui';
-import footerEEMixin from 'ee_else_ce/boards/mixins/modal_footer';
-import { deprecatedCreateFlash as Flash } from '../../../flash';
-import { __, n__ } from '../../../locale';
-import modalMixin from '../../mixins/modal_mixins';
-import boardsStore from '../../stores/boards_store';
-import ModalStore from '../../stores/modal_store';
-import ListsDropdown from './lists_dropdown.vue';
-
-export default {
-  components: {
-    ListsDropdown,
-    GlButton,
-  },
-  mixins: [modalMixin, footerEEMixin],
-  data() {
-    return {
-      modal: ModalStore.store,
-      state: boardsStore.state,
-    };
-  },
-  computed: {
-    submitDisabled() {
-      return !ModalStore.selectedCount();
-    },
-    submitText() {
-      const count = ModalStore.selectedCount();
-      if (!count) return __('Add issues');
-      return n__(`Add %d issue`, `Add %d issues`, count);
-    },
-  },
-  methods: {
-    buildUpdateRequest(list) {
-      return {
-        add_label_ids: [list.label.id],
-      };
-    },
-    addIssues() {
-      const firstListIndex = 1;
-      const list = this.modal.selectedList || this.state.lists[firstListIndex];
-      const selectedIssues = ModalStore.getSelectedIssues();
-      const issueIds = selectedIssues.map((issue) => issue.id);
-      const req = this.buildUpdateRequest(list);
-
-      // Post the data to the backend
-      boardsStore.bulkUpdate(issueIds, req).catch(() => {
-        Flash(__('Failed to update issues, please try again.'));
-
-        selectedIssues.forEach((issue) => {
-          list.removeIssue(issue);
-          list.issuesSize -= 1;
-        });
-      });
-
-      // Add the issues on the frontend
-      selectedIssues.forEach((issue) => {
-        list.addIssue(issue);
-        list.issuesSize += 1;
-      });
-
-      this.toggleModal(false);
-    },
-  },
-};
-</script>
-<template>
-  <footer class="form-actions add-issues-footer">
-    <div class="float-left">
-      <gl-button :disabled="submitDisabled" category="primary" variant="success" @click="addIssues">
-        {{ submitText }}
-      </gl-button>
-      <span class="inline add-issues-footer-to-list">{{ __('to list') }}</span>
-      <lists-dropdown />
-    </div>
-    <gl-button class="float-right" @click="toggleModal(false)">
-      {{ __('Cancel') }}
-    </gl-button>
-  </footer>
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/header.vue b/app/assets/javascripts/boards/components/modal/header.vue
deleted file mode 100644
index c3a71e7177a..00000000000
--- a/app/assets/javascripts/boards/components/modal/header.vue
+++ /dev/null
@@ -1,80 +0,0 @@
-<script>
-/* eslint-disable @gitlab/vue-require-i18n-strings */
-import { GlButton } from '@gitlab/ui';
-import { __ } from '~/locale';
-import modalMixin from '../../mixins/modal_mixins';
-import ModalStore from '../../stores/modal_store';
-import ModalFilters from './filters';
-import ModalTabs from './tabs.vue';
-
-export default {
-  components: {
-    ModalTabs,
-    ModalFilters,
-    GlButton,
-  },
-  mixins: [modalMixin],
-  props: {
-    projectId: {
-      type: Number,
-      required: true,
-    },
-    labelPath: {
-      type: String,
-      required: true,
-    },
-  },
-  data() {
-    return ModalStore.store;
-  },
-  computed: {
-    selectAllText() {
-      if (ModalStore.selectedCount() !== this.issues.length || this.issues.length === 0) {
-        return __('Select all');
-      }
-
-      return __('Deselect all');
-    },
-    showSearch() {
-      return this.activeTab === 'all' && !this.loading && this.issuesCount > 0;
-    },
-  },
-  methods: {
-    toggleAll() {
-      this.$refs.selectAllBtn.$el.blur();
-
-      ModalStore.toggleAll();
-    },
-  },
-};
-</script>
-<template>
-  <div>
-    <header class="add-issues-header border-top-0 form-actions">
-      <h2 class="m-0">
-        Add issues
-        <gl-button
-          category="tertiary"
-          icon="close"
-          class="close"
-          data-dismiss="modal"
-          :aria-label="__('Close')"
-          @click="toggleModal(false)"
-        />
-      </h2>
-    </header>
-    <modal-tabs v-if="!loading && issuesCount > 0" />
-    <div v-if="showSearch" class="d-flex gl-mb-3">
-      <modal-filters :store="filter" />
-      <gl-button
-        ref="selectAllBtn"
-        category="secondary"
-        variant="success"
-        class="gl-ml-3"
-        @click="toggleAll"
-      >
-        {{ selectAllText }}
-      </gl-button>
-    </div>
-  </div>
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/index.vue b/app/assets/javascripts/boards/components/modal/index.vue
deleted file mode 100644
index 5af90c1ee66..00000000000
--- a/app/assets/javascripts/boards/components/modal/index.vue
+++ /dev/null
@@ -1,151 +0,0 @@
-<script>
-/* global ListIssue */
-import { GlLoadingIcon } from '@gitlab/ui';
-import boardsStore from '~/boards/stores/boards_store';
-import { urlParamsToObject } from '~/lib/utils/common_utils';
-import ModalStore from '../../stores/modal_store';
-import EmptyState from './empty_state.vue';
-import ModalFooter from './footer.vue';
-import ModalHeader from './header.vue';
-import ModalList from './list.vue';
-
-export default {
-  components: {
-    EmptyState,
-    ModalHeader,
-    ModalList,
-    ModalFooter,
-    GlLoadingIcon,
-  },
-  props: {
-    newIssuePath: {
-      type: String,
-      required: true,
-    },
-    emptyStateSvg: {
-      type: String,
-      required: true,
-    },
-    projectId: {
-      type: Number,
-      required: true,
-    },
-    labelPath: {
-      type: String,
-      required: true,
-    },
-  },
-  data() {
-    return ModalStore.store;
-  },
-  computed: {
-    showList() {
-      if (this.activeTab === 'selected') {
-        return this.selectedIssues.length > 0;
-      }
-
-      return this.issuesCount > 0;
-    },
-    showEmptyState() {
-      if (!this.loading && this.issuesCount === 0) {
-        return true;
-      }
-
-      return this.activeTab === 'selected' && this.selectedIssues.length === 0;
-    },
-  },
-  watch: {
-    page() {
-      this.loadIssues();
-    },
-    showAddIssuesModal() {
-      if (this.showAddIssuesModal && !this.issues.length) {
-        this.loading = true;
-        const loadingDone = () => {
-          this.loading = false;
-        };
-
-        this.loadIssues().then(loadingDone).catch(loadingDone);
-      } else if (!this.showAddIssuesModal) {
-        this.issues = [];
-        this.selectedIssues = [];
-        this.issuesCount = false;
-      }
-    },
-    filter: {
-      handler() {
-        if (this.$el.tagName) {
-          this.page = 1;
-          this.filterLoading = true;
-          const loadingDone = () => {
-            this.filterLoading = false;
-          };
-
-          this.loadIssues(true).then(loadingDone).catch(loadingDone);
-        }
-      },
-      deep: true,
-    },
-  },
-  created() {
-    this.page = 1;
-  },
-  methods: {
-    loadIssues(clearIssues = false) {
-      if (!this.showAddIssuesModal) return false;
-
-      return boardsStore
-        .getBacklog({
-          ...urlParamsToObject(this.filter.path),
-          page: this.page,
-          per: this.perPage,
-        })
-        .then((res) => res.data)
-        .then((data) => {
-          if (clearIssues) {
-            this.issues = [];
-          }
-
-          data.issues.forEach((issueObj) => {
-            const issue = new ListIssue(issueObj);
-            const foundSelectedIssue = ModalStore.findSelectedIssue(issue);
-            issue.selected = Boolean(foundSelectedIssue);
-
-            this.issues.push(issue);
-          });
-
-          this.loadingNewPage = false;
-
-          if (!this.issuesCount) {
-            this.issuesCount = data.size;
-          }
-        })
-        .catch(() => {
-          // TODO: handle request error
-        });
-    },
-  },
-};
-</script>
-<template>
-  <div
-    v-if="showAddIssuesModal"
-    class="add-issues-modal d-flex position-fixed position-top-0 position-bottom-0 position-left-0 position-right-0 h-100"
-  >
-    <div class="add-issues-container d-flex flex-column m-auto rounded">
-      <modal-header :project-id="projectId" :label-path="labelPath" />
-      <modal-list v-if="!loading && showList && !filterLoading" :empty-state-svg="emptyStateSvg" />
-      <empty-state
-        v-if="showEmptyState"
-        :new-issue-path="newIssuePath"
-        :empty-state-svg="emptyStateSvg"
-      />
-      <section v-if="loading || filterLoading" class="add-issues-list d-flex h-100 text-center">
-        <div class="add-issues-list-loading w-100 align-self-center">
-          <gl-loading-icon size="md" />
-        </div>
-      </section>
-      <modal-footer />
-    </div>
-  </div>
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/list.vue b/app/assets/javascripts/boards/components/modal/list.vue
deleted file mode 100644
index e66cae0ce18..00000000000
--- a/app/assets/javascripts/boards/components/modal/list.vue
+++ /dev/null
@@ -1,141 +0,0 @@
-<script>
-import { GlIcon } from '@gitlab/ui';
-import { GlBreakpointInstance as bp } from '@gitlab/ui/dist/utils';
-import ModalStore from '../../stores/modal_store';
-import BoardCardInner from '../board_card_inner.vue';
-
-export default {
-  components: {
-    BoardCardInner,
-    GlIcon,
-  },
-  props: {
-    emptyStateSvg: {
-      type: String,
-      required: true,
-    },
-  },
-  data() {
-    return ModalStore.store;
-  },
-  computed: {
-    loopIssues() {
-      if (this.activeTab === 'all') {
-        return this.issues;
-      }
-
-      return this.selectedIssues;
-    },
-    groupedIssues() {
-      const groups = [];
-      this.loopIssues.forEach((issue, i) => {
-        const index = i % this.columns;
-
-        if (!groups[index]) {
-          groups.push([]);
-        }
-
-        groups[index].push(issue);
-      });
-
-      return groups;
-    },
-  },
-  watch: {
-    activeTab() {
-      if (this.activeTab === 'all') {
-        ModalStore.purgeUnselectedIssues();
-      }
-    },
-  },
-  mounted() {
-    this.scrollHandlerWrapper = this.scrollHandler.bind(this);
-    this.setColumnCountWrapper = this.setColumnCount.bind(this);
-    this.setColumnCount();
-
-    this.$refs.list.addEventListener('scroll', this.scrollHandlerWrapper);
-    window.addEventListener('resize', this.setColumnCountWrapper);
-  },
-  beforeDestroy() {
-    this.$refs.list.removeEventListener('scroll', this.scrollHandlerWrapper);
-    window.removeEventListener('resize', this.setColumnCountWrapper);
-  },
-  methods: {
-    scrollHandler() {
-      const currentPage = Math.floor(this.issues.length / this.perPage);
-
-      if (
-        this.scrollTop() > this.scrollHeight() - 100 &&
-        !this.loadingNewPage &&
-        currentPage === this.page
-      ) {
-        this.loadingNewPage = true;
-        this.page += 1;
-      }
-    },
-    toggleIssue(e, issue) {
-      if (e.target.tagName !== 'A') {
-        ModalStore.toggleIssue(issue);
-      }
-    },
-    listHeight() {
-      return this.$refs.list.getBoundingClientRect().height;
-    },
-    scrollHeight() {
-      return this.$refs.list.scrollHeight;
-    },
-    scrollTop() {
-      return this.$refs.list.scrollTop + this.listHeight();
-    },
-    showIssue(issue) {
-      if (this.activeTab === 'all') return true;
-
-      const index = ModalStore.selectedIssueIndex(issue);
-
-      return index !== -1;
-    },
-    setColumnCount() {
-      const breakpoint = bp.getBreakpointSize();
-
-      if (breakpoint === 'xl' || breakpoint === 'lg') {
-        this.columns = 3;
-      } else if (breakpoint === 'md') {
-        this.columns = 2;
-      } else {
-        this.columns = 1;
-      }
-    },
-  },
-};
-</script>
-<template>
-  <section ref="list" class="add-issues-list add-issues-list-columns d-flex h-100">
-    <div
-      v-if="issuesCount > 0 && issues.length === 0"
-      class="empty-state add-issues-empty-state-filter text-center"
-    >
-      <div class="svg-content"><img :src="emptyStateSvg" /></div>
-      <div class="text-content">
-        <h4>{{ __('There are no issues to show.') }}</h4>
-      </div>
-    </div>
-    <div v-for="(group, index) in groupedIssues" :key="index" class="add-issues-list-column">
-      <div v-for="issue in group" v-if="showIssue(issue)" :key="issue.id" class="board-card-parent">
-        <div
-          :class="{ 'is-active': issue.selected }"
-          class="board-card position-relative p-3 rounded"
-          @click="toggleIssue($event, issue)"
-        >
-          <board-card-inner :item="issue" />
-          <gl-icon
-            v-if="issue.selected"
-            :aria-label="'Issue #' + issue.id + ' selected'"
-            name="mobile-issue-close"
-            aria-checked="true"
-            class="issue-card-selected text-center"
-          />
-        </div>
-      </div>
-    </div>
-  </section>
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/lists_dropdown.vue b/app/assets/javascripts/boards/components/modal/lists_dropdown.vue
deleted file mode 100644
index 2065568d275..00000000000
--- a/app/assets/javascripts/boards/components/modal/lists_dropdown.vue
+++ /dev/null
@@ -1,49 +0,0 @@
-<script>
-import { GlLink, GlIcon } from '@gitlab/ui';
-import boardsStore from '../../stores/boards_store';
-import ModalStore from '../../stores/modal_store';
-
-export default {
-  components: {
-    GlLink,
-    GlIcon,
-  },
-  data() {
-    return {
-      modal: ModalStore.store,
-      state: boardsStore.state,
-    };
-  },
-  computed: {
-    selected() {
-      return this.modal.selectedList || this.state.lists[1];
-    },
-  },
-  destroyed() {
-    this.modal.selectedList = null;
-  },
-};
-</script>
-<template>
-  <div class="dropdown inline">
-    <button class="dropdown-menu-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
-      <span :style="{ backgroundColor: selected.label.color }" class="dropdown-label-box"> </span>
-      {{ selected.title }} <gl-icon name="chevron-down" class="dropdown-menu-toggle-icon" />
-    </button>
-    <div class="dropdown-menu dropdown-menu-selectable dropdown-menu-drop-up">
-      <ul>
-        <li v-for="(list, i) in state.lists" v-if="list.type == 'label'" :key="i">
-          <gl-link
-            :class="{ 'is-active': list.id == selected.id }"
-            href="#"
-            role="button"
-            @click.prevent="modal.selectedList = list"
-          >
-            <span :style="{ backgroundColor: list.label.color }" class="dropdown-label-box"> </span>
-            {{ list.title }}
-          </gl-link>
-        </li>
-      </ul>
-    </div>
-  </div>
-</template>
diff --git a/app/assets/javascripts/boards/components/modal/tabs.vue b/app/assets/javascripts/boards/components/modal/tabs.vue
deleted file mode 100644
index 0b717f516db..00000000000
--- a/app/assets/javascripts/boards/components/modal/tabs.vue
+++ /dev/null
@@ -1,42 +0,0 @@
-<script>
-/* eslint-disable @gitlab/vue-require-i18n-strings */
-import { GlTabs, GlTab, GlBadge } from '@gitlab/ui';
-import modalMixin from '../../mixins/modal_mixins';
-import ModalStore from '../../stores/modal_store';
-
-export default {
-  components: {
-    GlTabs,
-    GlTab,
-    GlBadge,
-  },
-  mixins: [modalMixin],
-  data() {
-    return ModalStore.store;
-  },
-  computed: {
-    selectedCount() {
-      return ModalStore.selectedCount();
-    },
-  },
-  destroyed() {
-    this.activeTab = 'all';
-  },
-};
-</script>
-<template>
-  <gl-tabs class="gl-mt-3">
-    <gl-tab @click.prevent="changeTab('all')">
-      <template slot="title">
-        <span>Open issues</span>
-        <gl-badge size="sm" class="gl-tab-counter-badge">{{ issuesCount }}</gl-badge>
-      </template>
-    </gl-tab>
-    <gl-tab @click.prevent="changeTab('selected')">
-      <template slot="title">
-        <span>Selected issues</span>
-        <gl-badge size="sm" class="gl-tab-counter-badge">{{ selectedCount }}</gl-badge>
-      </template>
-    </gl-tab>
-  </gl-tabs>
-</template>
diff --git a/app/assets/javascripts/boards/components/sidebar/board_editable_item.vue b/app/assets/javascripts/boards/components/sidebar/board_editable_item.vue
index 61863bbe2a9..352a25ef6d9 100644
--- a/app/assets/javascripts/boards/components/sidebar/board_editable_item.vue
+++ b/app/assets/javascripts/boards/components/sidebar/board_editable_item.vue
@@ -98,14 +98,14 @@ export default {
       <gl-button
         v-if="canUpdate"
         variant="link"
-        class="gl-text-gray-900! gl-ml-5 js-sidebar-dropdown-toggle"
+        class="gl-text-gray-900! gl-ml-5 js-sidebar-dropdown-toggle edit-link"
         data-testid="edit-button"
         @click="toggle"
       >
         {{ __('Edit') }}
       </gl-button>
     </header>
-    <div v-show="!edit" class="gl-text-gray-500" data-testid="collapsed-content">
+    <div v-show="!edit" class="gl-text-gray-500 value" data-testid="collapsed-content">
       <slot name="collapsed">{{ __('None') }}</slot>
     </div>
     <div v-show="edit" data-testid="expanded-content">
diff --git a/app/assets/javascripts/boards/components/sidebar/board_sidebar_due_date.vue b/app/assets/javascripts/boards/components/sidebar/board_sidebar_due_date.vue
index 6d928337396..13e1e232676 100644
--- a/app/assets/javascripts/boards/components/sidebar/board_sidebar_due_date.vue
+++ b/app/assets/javascripts/boards/components/sidebar/board_sidebar_due_date.vue
@@ -18,16 +18,16 @@ export default {
     };
   },
   computed: {
-    ...mapGetters(['activeIssue', 'projectPathForActiveIssue']),
+    ...mapGetters(['activeBoardItem', 'projectPathForActiveIssue']),
     hasDueDate() {
-      return this.activeIssue.dueDate != null;
+      return this.activeBoardItem.dueDate != null;
     },
     parsedDueDate() {
       if (!this.hasDueDate) {
         return null;
       }
 
-      return parsePikadayDate(this.activeIssue.dueDate);
+      return parsePikadayDate(this.activeBoardItem.dueDate);
     },
     formattedDueDate() {
       if (!this.hasDueDate) {
@@ -69,6 +69,7 @@ export default {
   <board-editable-item
     ref="sidebarItem"
     class="board-sidebar-due-date"
+    data-testid="sidebar-due-date"
     :title="$options.i18n.dueDate"
     :loading="loading"
     @open="openDatePicker"
diff --git a/app/assets/javascripts/boards/components/sidebar/board_sidebar_labels_select.vue b/app/assets/javascripts/boards/components/sidebar/board_sidebar_labels_select.vue
index 55b1596ee18..f78be83cd82 100644
--- a/app/assets/javascripts/boards/components/sidebar/board_sidebar_labels_select.vue
+++ b/app/assets/javascripts/boards/components/sidebar/board_sidebar_labels_select.vue
@@ -21,9 +21,9 @@ export default {
     };
   },
   computed: {
-    ...mapGetters(['activeIssue', 'projectPathForActiveIssue']),
+    ...mapGetters(['activeBoardItem', 'projectPathForActiveIssue']),
     selectedLabels() {
-      const { labels = [] } = this.activeIssue;
+      const { labels = [] } = this.activeBoardItem;
 
       return labels.map((label) => ({
         ...label,
@@ -31,7 +31,7 @@ export default {
       }));
     },
     issueLabels() {
-      const { labels = [] } = this.activeIssue;
+      const { labels = [] } = this.activeBoardItem;
 
       return labels.map((label) => ({
         ...label,
@@ -40,7 +40,7 @@ export default {
     },
   },
   methods: {
-    ...mapActions(['setActiveIssueLabels']),
+    ...mapActions(['setActiveBoardItemLabels']),
     async setLabels(payload) {
       this.loading = true;
       this.$refs.sidebarItem.collapse();
@@ -52,7 +52,7 @@ export default {
           .map((label) => label.id);
 
         const input = { addLabelIds, removeLabelIds, projectPath: this.projectPathForActiveIssue };
-        await this.setActiveIssueLabels(input);
+        await this.setActiveBoardItemLabels(input);
       } catch (e) {
         createFlash({ message: __('An error occurred while updating labels.') });
       } finally {
@@ -65,7 +65,7 @@ export default {
       try {
         const removeLabelIds = [getIdFromGraphQLId(id)];
         const input = { removeLabelIds, projectPath: this.projectPathForActiveIssue };
-        await this.setActiveIssueLabels(input);
+        await this.setActiveBoardItemLabels(input);
       } catch (e) {
         createFlash({ message: __('An error occurred when removing the label.') });
       } finally {
diff --git a/app/assets/javascripts/boards/components/sidebar/board_sidebar_milestone_select.vue b/app/assets/javascripts/boards/components/sidebar/board_sidebar_milestone_select.vue
index 829f1c72806..ad225c7bf5c 100644
--- a/app/assets/javascripts/boards/components/sidebar/board_sidebar_milestone_select.vue
+++ b/app/assets/javascripts/boards/components/sidebar/board_sidebar_milestone_select.vue
@@ -56,20 +56,20 @@ export default {
     },
   },
   computed: {
-    ...mapGetters(['activeIssue']),
+    ...mapGetters(['activeBoardItem']),
     hasMilestone() {
-      return this.activeIssue.milestone !== null;
+      return this.activeBoardItem.milestone !== null;
     },
     groupFullPath() {
-      const { referencePath = '' } = this.activeIssue;
+      const { referencePath = '' } = this.activeBoardItem;
       return referencePath.slice(0, referencePath.indexOf('/'));
     },
     projectPath() {
-      const { referencePath = '' } = this.activeIssue;
+      const { referencePath = '' } = this.activeBoardItem;
       return referencePath.slice(0, referencePath.indexOf('#'));
     },
     dropdownText() {
-      return this.activeIssue.milestone?.title ?? this.$options.i18n.noMilestone;
+      return this.activeBoardItem.milestone?.title ?? this.$options.i18n.noMilestone;
     },
   },
   methods: {
@@ -113,11 +113,12 @@ export default {
     ref="sidebarItem"
     :title="$options.i18n.milestone"
     :loading="loading"
-    @open="handleOpen()"
+    data-testid="sidebar-milestones"
+    @open="handleOpen"
     @close="handleClose"
   >
     <template v-if="hasMilestone" #collapsed>
-      <strong class="gl-text-gray-900">{{ activeIssue.milestone.title }}</strong>
+      <strong class="gl-text-gray-900">{{ activeBoardItem.milestone.title }}</strong>
     </template>
     <gl-dropdown
       ref="dropdown"
@@ -130,7 +131,7 @@ export default {
       <gl-dropdown-item
         data-testid="no-milestone-item"
         :is-check-item="true"
-        :is-checked="!activeIssue.milestone"
+        :is-checked="!activeBoardItem.milestone"
         @click="setMilestone(null)"
       >
         {{ $options.i18n.noMilestone }}
@@ -142,7 +143,7 @@ export default {
           v-for="milestone in milestones"
           :key="milestone.id"
           :is-check-item="true"
-          :is-checked="activeIssue.milestone && milestone.id === activeIssue.milestone.id"
+          :is-checked="activeBoardItem.milestone && milestone.id === activeBoardItem.milestone.id"
           data-testid="milestone-item"
           @click="setMilestone(milestone.id)"
         >
diff --git a/app/assets/javascripts/boards/components/sidebar/board_sidebar_subscription.vue b/app/assets/javascripts/boards/components/sidebar/board_sidebar_subscription.vue
index f01c8e8fa20..376985f7cb6 100644
--- a/app/assets/javascripts/boards/components/sidebar/board_sidebar_subscription.vue
+++ b/app/assets/javascripts/boards/components/sidebar/board_sidebar_subscription.vue
@@ -21,27 +21,31 @@ export default {
   components: {
     GlToggle,
   },
+  inject: ['emailsDisabled'],
   data() {
     return {
       loading: false,
     };
   },
   computed: {
-    ...mapGetters(['activeIssue', 'projectPathForActiveIssue']),
+    ...mapGetters(['activeBoardItem', 'projectPathForActiveIssue', 'isEpicBoard']),
+    isEmailsDisabled() {
+      return this.isEpicBoard ? this.emailsDisabled : this.activeBoardItem.emailsDisabled;
+    },
     notificationText() {
-      return this.activeIssue.emailsDisabled
+      return this.isEmailsDisabled
         ? this.$options.i18n.header.subscribeDisabledDescription
         : this.$options.i18n.header.title;
     },
   },
   methods: {
-    ...mapActions(['setActiveIssueSubscribed']),
+    ...mapActions(['setActiveItemSubscribed']),
     async handleToggleSubscription() {
       this.loading = true;
 
       try {
-        await this.setActiveIssueSubscribed({
-          subscribed: !this.activeIssue.subscribed,
+        await this.setActiveItemSubscribed({
+          subscribed: !this.activeBoardItem.subscribed,
           projectPath: this.projectPathForActiveIssue,
         });
       } catch (error) {
@@ -61,8 +65,8 @@ export default {
   >
     <span data-testid="notification-header-text"> {{ notificationText }} </span>
     <gl-toggle
-      v-if="!activeIssue.emailsDisabled"
-      :value="activeIssue.subscribed"
+      v-if="!isEmailsDisabled"
+      :value="activeBoardItem.subscribed"
       :is-loading="loading"
       :label="$options.i18n.header.title"
       label-position="hidden"
diff --git a/app/assets/javascripts/boards/components/sidebar/board_sidebar_time_tracker.vue b/app/assets/javascripts/boards/components/sidebar/board_sidebar_time_tracker.vue
new file mode 100644
index 00000000000..96d444980a8
--- /dev/null
+++ b/app/assets/javascripts/boards/components/sidebar/board_sidebar_time_tracker.vue
@@ -0,0 +1,25 @@
+<script>
+import { mapGetters } from 'vuex';
+import IssuableTimeTracker from '~/sidebar/components/time_tracking/time_tracker.vue';
+
+export default {
+  components: {
+    IssuableTimeTracker,
+  },
+  inject: ['timeTrackingLimitToHours'],
+  computed: {
+    ...mapGetters(['activeBoardItem']),
+  },
+};
+</script>
+
+<template>
+  <issuable-time-tracker
+    :time-estimate="activeBoardItem.timeEstimate"
+    :time-spent="activeBoardItem.totalTimeSpent"
+    :human-time-estimate="activeBoardItem.humanTimeEstimate"
+    :human-time-spent="activeBoardItem.humanTotalTimeSpent"
+    :limit-to-hours="timeTrackingLimitToHours"
+    :show-collapsed="false"
+  />
+</template>
diff --git a/app/assets/javascripts/boards/components/sidebar/board_sidebar_issue_title.vue b/app/assets/javascripts/boards/components/sidebar/board_sidebar_title.vue
index 95864bd62a7..b8d3107c377 100644
--- a/app/assets/javascripts/boards/components/sidebar/board_sidebar_issue_title.vue
+++ b/app/assets/javascripts/boards/components/sidebar/board_sidebar_title.vue
@@ -27,12 +27,12 @@ export default {
     };
   },
   computed: {
-    ...mapGetters({ issue: 'activeIssue' }),
+    ...mapGetters({ item: 'activeBoardItem' }),
     pendingChangesStorageKey() {
-      return this.getPendingChangesKey(this.issue);
+      return this.getPendingChangesKey(this.item);
     },
     projectPath() {
-      const referencePath = this.issue.referencePath || '';
+      const referencePath = this.item.referencePath || '';
       return referencePath.slice(0, referencePath.indexOf('#'));
     },
     validationState() {
@@ -40,29 +40,29 @@ export default {
     },
   },
   watch: {
-    issue: {
-      handler(updatedIssue, formerIssue) {
-        if (formerIssue?.title !== this.title) {
-          localStorage.setItem(this.getPendingChangesKey(formerIssue), this.title);
+    item: {
+      handler(updatedItem, formerItem) {
+        if (formerItem?.title !== this.title) {
+          localStorage.setItem(this.getPendingChangesKey(formerItem), this.title);
         }
 
-        this.title = updatedIssue.title;
+        this.title = updatedItem.title;
         this.setPendingState();
       },
       immediate: true,
     },
   },
   methods: {
-    ...mapActions(['setActiveIssueTitle']),
-    getPendingChangesKey(issue) {
-      if (!issue) {
+    ...mapActions(['setActiveItemTitle']),
+    getPendingChangesKey(item) {
+      if (!item) {
         return '';
       }
 
       return joinPaths(
         window.location.pathname.slice(1),
-        String(issue.id),
-        'issue-title-pending-changes',
+        String(item.id),
+        'item-title-pending-changes',
       );
     },
     async setPendingState() {
@@ -78,7 +78,7 @@ export default {
       }
     },
     cancel() {
-      this.title = this.issue.title;
+      this.title = this.item.title;
       this.$refs.sidebarItem.collapse();
       this.showChangesAlert = false;
       localStorage.removeItem(this.pendingChangesStorageKey);
@@ -86,24 +86,24 @@ export default {
     async setTitle() {
       this.$refs.sidebarItem.collapse();
 
-      if (!this.title || this.title === this.issue.title) {
+      if (!this.title || this.title === this.item.title) {
         return;
       }
 
       try {
         this.loading = true;
-        await this.setActiveIssueTitle({ title: this.title, projectPath: this.projectPath });
+        await this.setActiveItemTitle({ title: this.title, projectPath: this.projectPath });
         localStorage.removeItem(this.pendingChangesStorageKey);
         this.showChangesAlert = false;
       } catch (e) {
-        this.title = this.issue.title;
+        this.title = this.item.title;
         createFlash({ message: this.$options.i18n.updateTitleError });
       } finally {
         this.loading = false;
       }
     },
     handleOffClick() {
-      if (this.title !== this.issue.title) {
+      if (this.title !== this.item.title) {
         this.showChangesAlert = true;
         localStorage.setItem(this.pendingChangesStorageKey, this.title);
       } else {
@@ -112,11 +112,11 @@ export default {
     },
   },
   i18n: {
-    issueTitlePlaceholder: __('Issue title'),
+    titlePlaceholder: __('Title'),
     submitButton: __('Save changes'),
     cancelButton: __('Cancel'),
-    updateTitleError: __('An error occurred when updating the issue title'),
-    invalidFeedback: __('An issue title is required'),
+    updateTitleError: __('An error occurred when updating the title'),
+    invalidFeedback: __('A title is required'),
     reviewYourChanges: __('Changes to the title have not been saved'),
   },
 };
@@ -131,10 +131,10 @@ export default {
     @off-click="handleOffClick"
   >
     <template #title>
-      <span class="gl-font-weight-bold" data-testid="issue-title">{{ issue.title }}</span>
+      <span class="gl-font-weight-bold" data-testid="item-title">{{ item.title }}</span>
     </template>
     <template #collapsed>
-      <span class="gl-text-gray-800">{{ issue.referencePath }}</span>
+      <span class="gl-text-gray-800">{{ item.referencePath }}</span>
     </template>
     <gl-alert v-if="showChangesAlert" variant="warning" class="gl-mb-5" :dismissible="false">
       {{ $options.i18n.reviewYourChanges }}
@@ -144,7 +144,7 @@ export default {
         <gl-form-input
           v-model="title"
           v-autofocusonshow
-          :placeholder="$options.i18n.issueTitlePlaceholder"
+          :placeholder="$options.i18n.titlePlaceholder"
           :state="validationState"
         />
       </gl-form-group>
diff --git a/app/assets/javascripts/boards/components/toggle_focus.vue b/app/assets/javascripts/boards/components/toggle_focus.vue
index 74805f8a681..49f5e7d20a9 100644
--- a/app/assets/javascripts/boards/components/toggle_focus.vue
+++ b/app/assets/javascripts/boards/components/toggle_focus.vue
@@ -38,14 +38,16 @@ export default {
 </script>
 
 <template>
-  <div class="board-extra-actions gl-ml-3 gl-display-flex gl-align-items-center">
+  <div class="gl-ml-3 gl-display-none gl-md-display-flex gl-align-items-center">
     <gl-button
       ref="toggleFocusModeButton"
       v-gl-tooltip
+      category="tertiary"
       :icon="isFullscreen ? 'minimize' : 'maximize'"
       class="js-focus-mode-btn"
       data-qa-selector="focus_mode_button"
       :title="$options.i18n.toggleFocusMode"
+      :aria-label="$options.i18n.toggleFocusMode"
       @click="toggleFocusMode"
     />
   </div>
diff --git a/app/assets/javascripts/boards/config_toggle.js b/app/assets/javascripts/boards/config_toggle.js
index 7f327c5764d..41938d8e284 100644
--- a/app/assets/javascripts/boards/config_toggle.js
+++ b/app/assets/javascripts/boards/config_toggle.js
@@ -2,14 +2,15 @@ import Vue from 'vue';
 import { parseBoolean } from '~/lib/utils/common_utils';
 import ConfigToggle from './components/config_toggle.vue';
 
-export default (boardsStore) => {
+export default (boardsStore = undefined) => {
   const el = document.querySelector('.js-board-config');
 
   if (!el) {
     return;
   }
 
-  gl.boardConfigToggle = new Vue({
+  // eslint-disable-next-line no-new
+  new Vue({
     el,
     render(h) {
       return h(ConfigToggle, {
diff --git a/app/assets/javascripts/boards/constants.js b/app/assets/javascripts/boards/constants.js
index 65ebfe7be6c..4ebd30fe67b 100644
--- a/app/assets/javascripts/boards/constants.js
+++ b/app/assets/javascripts/boards/constants.js
@@ -1,4 +1,9 @@
 import { __ } from '~/locale';
+import updateEpicSubscriptionMutation from '~/sidebar/queries/update_epic_subscription.mutation.graphql';
+import updateEpicTitleMutation from '~/sidebar/queries/update_epic_title.mutation.graphql';
+import boardBlockingIssuesQuery from './graphql/board_blocking_issues.query.graphql';
+import issueSetSubscriptionMutation from './graphql/issue_set_subscription.mutation.graphql';
+import issueSetTitleMutation from './graphql/issue_set_title.mutation.graphql';
 
 export const issuableTypes = {
   issue: 'issue',
@@ -45,3 +50,27 @@ export default {
   BoardType,
   ListType,
 };
+
+export const blockingIssuablesQueries = {
+  [issuableTypes.issue]: {
+    query: boardBlockingIssuesQuery,
+  },
+};
+
+export const titleQueries = {
+  [issuableTypes.issue]: {
+    mutation: issueSetTitleMutation,
+  },
+  [issuableTypes.epic]: {
+    mutation: updateEpicTitleMutation,
+  },
+};
+
+export const subscriptionQueries = {
+  [issuableTypes.issue]: {
+    mutation: issueSetSubscriptionMutation,
+  },
+  [issuableTypes.epic]: {
+    mutation: updateEpicSubscriptionMutation,
+  },
+};
diff --git a/app/assets/javascripts/boards/ee_functions.js b/app/assets/javascripts/boards/ee_functions.js
index b6b34556663..62a0d930ec0 100644
--- a/app/assets/javascripts/boards/ee_functions.js
+++ b/app/assets/javascripts/boards/ee_functions.js
@@ -2,4 +2,3 @@ export const setWeightFetchingState = () => {};
 export const setEpicFetchingState = () => {};
 
 export const getMilestoneTitle = () => ({});
-export const getBoardsModalData = () => ({});
diff --git a/app/assets/javascripts/boards/filtered_search.js b/app/assets/javascripts/boards/filtered_search.js
deleted file mode 100644
index 182a2cf3724..00000000000
--- a/app/assets/javascripts/boards/filtered_search.js
+++ /dev/null
@@ -1,25 +0,0 @@
-import Vue from 'vue';
-import store from '~/boards/stores';
-import { queryToObject } from '~/lib/utils/url_utility';
-import FilteredSearch from './components/filtered_search.vue';
-
-export default () => {
-  const queryParams = queryToObject(window.location.search);
-  const el = document.getElementById('js-board-filtered-search');
-
-  /*
-    When https://github.com/vuejs/vue-apollo/pull/1153 is merged and deployed
-    we can remove apolloProvider option from here. Currently without it its causing
-    an error
-  */
-
-  return new Vue({
-    el,
-    store,
-    apolloProvider: {},
-    render: (createElement) =>
-      createElement(FilteredSearch, {
-        props: { search: queryParams.search },
-      }),
-  });
-};
diff --git a/app/assets/javascripts/boards/graphql/board_blocking_issues.query.graphql b/app/assets/javascripts/boards/graphql/board_blocking_issues.query.graphql
new file mode 100644
index 00000000000..4dc245660a4
--- /dev/null
+++ b/app/assets/javascripts/boards/graphql/board_blocking_issues.query.graphql
@@ -0,0 +1,16 @@
+query BoardBlockingIssues($id: IssueID!) {
+  issuable: issue(id: $id) {
+    __typename
+    id
+    blockingIssuables: blockedByIssues {
+      __typename
+      nodes {
+        id
+        iid
+        title
+        reference(full: true)
+        webUrl
+      }
+    }
+  }
+}
diff --git a/app/assets/javascripts/boards/graphql/issue.fragment.graphql b/app/assets/javascripts/boards/graphql/issue.fragment.graphql
index 1395bef39ed..7ecf9261214 100644
--- a/app/assets/javascripts/boards/graphql/issue.fragment.graphql
+++ b/app/assets/javascripts/boards/graphql/issue.fragment.graphql
@@ -7,6 +7,10 @@ fragment IssueNode on Issue {
   referencePath: reference(full: true)
   dueDate
   timeEstimate
+  totalTimeSpent
+  humanTimeEstimate
+  humanTotalTimeSpent
+  emailsDisabled
   confidential
   webUrl
   subscribed
diff --git a/app/assets/javascripts/boards/graphql/issue_set_subscription.mutation.graphql b/app/assets/javascripts/boards/graphql/issue_set_subscription.mutation.graphql
index 1f383245ac2..bfb87758e17 100644
--- a/app/assets/javascripts/boards/graphql/issue_set_subscription.mutation.graphql
+++ b/app/assets/javascripts/boards/graphql/issue_set_subscription.mutation.graphql
@@ -1,5 +1,5 @@
 mutation issueSetSubscription($input: IssueSetSubscriptionInput!) {
-  issueSetSubscription(input: $input) {
+  updateIssuableSubscription: issueSetSubscription(input: $input) {
     issue {
       subscribed
     }
diff --git a/app/assets/javascripts/boards/graphql/issue_set_title.mutation.graphql b/app/assets/javascripts/boards/graphql/issue_set_title.mutation.graphql
index 62e6c1352a6..6ad12d982e0 100644
--- a/app/assets/javascripts/boards/graphql/issue_set_title.mutation.graphql
+++ b/app/assets/javascripts/boards/graphql/issue_set_title.mutation.graphql
@@ -1,5 +1,5 @@
 mutation issueSetTitle($input: UpdateIssueInput!) {
-  updateIssue(input: $input) {
+  updateIssuableTitle: updateIssue(input: $input) {
     issue {
       title
     }
diff --git a/app/assets/javascripts/boards/index.js b/app/assets/javascripts/boards/index.js
index ceca5b0a451..e3f9d2f24c2 100644
--- a/app/assets/javascripts/boards/index.js
+++ b/app/assets/javascripts/boards/index.js
@@ -10,26 +10,21 @@ import {
   setWeightFetchingState,
   setEpicFetchingState,
   getMilestoneTitle,
-  getBoardsModalData,
 } from 'ee_else_ce/boards/ee_functions';
 import toggleEpicsSwimlanes from 'ee_else_ce/boards/toggle_epics_swimlanes';
 import toggleLabels from 'ee_else_ce/boards/toggle_labels';
 import BoardAddNewColumnTrigger from '~/boards/components/board_add_new_column_trigger.vue';
 import BoardContent from '~/boards/components/board_content.vue';
-import BoardExtraActions from '~/boards/components/board_extra_actions.vue';
 import './models/label';
 import './models/assignee';
 import '~/boards/models/milestone';
 import '~/boards/models/project';
 import '~/boards/filters/due_date_filters';
-import BoardAddIssuesModal from '~/boards/components/modal/index.vue';
 import { issuableTypes } from '~/boards/constants';
 import eventHub from '~/boards/eventhub';
 import FilteredSearchBoards from '~/boards/filtered_search_boards';
-import modalMixin from '~/boards/mixins/modal_mixins';
 import store from '~/boards/stores';
 import boardsStore from '~/boards/stores/boards_store';
-import ModalStore from '~/boards/stores/modal_store';
 import toggleFocusMode from '~/boards/toggle_focus';
 import { deprecatedCreateFlash as Flash } from '~/flash';
 import createDefaultClient from '~/lib/graphql';
@@ -72,21 +67,12 @@ export default () => {
     boardsStore.setTimeTrackingLimitToHours($boardApp.dataset.timeTrackingLimitToHours);
   }
 
-  if (gon?.features?.boardsFilteredSearch) {
-    import('~/boards/filtered_search')
-      .then(({ default: initFilteredSearch }) => {
-        initFilteredSearch(apolloProvider);
-      })
-      .catch(() => {});
-  }
-
   // eslint-disable-next-line @gitlab/no-runtime-template-compiler
   issueBoardsApp = new Vue({
     el: $boardApp,
     components: {
       BoardContent,
       BoardSidebar,
-      BoardAddIssuesModal,
       BoardSettingsSidebar: () => import('~/boards/components/board_settings_sidebar.vue'),
     },
     provide: {
@@ -95,6 +81,7 @@ export default () => {
       rootPath: $boardApp.dataset.rootPath,
       currentUserId: gon.current_user_id || null,
       canUpdate: parseBoolean($boardApp.dataset.canUpdate),
+      canAdminList: parseBoolean($boardApp.dataset.canAdminList),
       labelsFetchPath: $boardApp.dataset.labelsFetchPath,
       labelsManagePath: $boardApp.dataset.labelsManagePath,
       labelsFilterBasePath: $boardApp.dataset.labelsFilterBasePath,
@@ -107,6 +94,8 @@ export default () => {
       milestoneListsAvailable: parseBoolean($boardApp.dataset.milestoneListsAvailable),
       assigneeListsAvailable: parseBoolean($boardApp.dataset.assigneeListsAvailable),
       iterationListsAvailable: parseBoolean($boardApp.dataset.iterationListsAvailable),
+      issuableType: issuableTypes.issue,
+      emailsDisabled: parseBoolean($boardApp.dataset.emailsDisabled),
     },
     store,
     apolloProvider,
@@ -174,15 +163,9 @@ export default () => {
       eventHub.$off('initialBoardLoad', this.initialBoardLoad);
     },
     mounted() {
-      if (!gon.features?.boardsFilteredSearch) {
-        this.filterManager = new FilteredSearchBoards(
-          boardsStore.filter,
-          true,
-          boardsStore.cantEdit,
-        );
+      this.filterManager = new FilteredSearchBoards(boardsStore.filter, true, boardsStore.cantEdit);
 
-        this.filterManager.setup();
-      }
+      this.filterManager.setup();
 
       this.performSearch();
 
@@ -323,49 +306,7 @@ export default () => {
 
   boardConfigToggle(boardsStore);
 
-  const issueBoardsModal = document.getElementById('js-add-issues-btn');
-
-  if (issueBoardsModal && gon.features.addIssuesButton) {
-    // eslint-disable-next-line no-new
-    new Vue({
-      el: issueBoardsModal,
-      mixins: [modalMixin],
-      data() {
-        return {
-          modal: ModalStore.store,
-          store: boardsStore.state,
-          ...getBoardsModalData(),
-          canAdminList: this.$options.el.hasAttribute('data-can-admin-list'),
-        };
-      },
-      computed: {
-        disabled() {
-          if (!this.store) {
-            return true;
-          }
-          return !this.store.lists.filter((list) => !list.preset).length;
-        },
-      },
-      methods: {
-        openModal() {
-          if (!this.disabled) {
-            this.toggleModal(true);
-          }
-        },
-      },
-      render(createElement) {
-        return createElement(BoardExtraActions, {
-          props: {
-            canAdminList: this.$options.el.hasAttribute('data-can-admin-list'),
-            openModal: this.openModal,
-            disabled: this.disabled,
-          },
-        });
-      },
-    });
-  }
-
-  toggleFocusMode(ModalStore, boardsStore);
+  toggleFocusMode();
   toggleLabels();
 
   if (gon.licensed_features?.swimlanes) {
diff --git a/app/assets/javascripts/boards/mixins/board_new_issue.js b/app/assets/javascripts/boards/mixins/board_new_issue.js
new file mode 100644
index 00000000000..d4b74544735
--- /dev/null
+++ b/app/assets/javascripts/boards/mixins/board_new_issue.js
@@ -0,0 +1,6 @@
+export default {
+  // EE-only
+  methods: {
+    extraIssueInput: () => {},
+  },
+};
diff --git a/app/assets/javascripts/boards/mixins/modal_footer.js b/app/assets/javascripts/boards/mixins/modal_footer.js
deleted file mode 100644
index ff8b4c56321..00000000000
--- a/app/assets/javascripts/boards/mixins/modal_footer.js
+++ /dev/null
@@ -1 +0,0 @@
-export default {};
diff --git a/app/assets/javascripts/boards/mixins/modal_mixins.js b/app/assets/javascripts/boards/mixins/modal_mixins.js
deleted file mode 100644
index 6c97e1629bf..00000000000
--- a/app/assets/javascripts/boards/mixins/modal_mixins.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import ModalStore from '../stores/modal_store';
-
-export default {
-  methods: {
-    toggleModal(toggle) {
-      ModalStore.store.showAddIssuesModal = toggle;
-    },
-    changeTab(tab) {
-      ModalStore.store.activeTab = tab;
-    },
-  },
-};
diff --git a/app/assets/javascripts/boards/stores/actions.js b/app/assets/javascripts/boards/stores/actions.js
index 19b31ee7291..8005414962c 100644
--- a/app/assets/javascripts/boards/stores/actions.js
+++ b/app/assets/javascripts/boards/stores/actions.js
@@ -1,16 +1,21 @@
+import * as Sentry from '@sentry/browser';
 import { pick } from 'lodash';
 import createBoardListMutation from 'ee_else_ce/boards/graphql/board_list_create.mutation.graphql';
 import boardListsQuery from 'ee_else_ce/boards/graphql/board_lists.query.graphql';
+import issueMoveListMutation from 'ee_else_ce/boards/graphql/issue_move_list.mutation.graphql';
 import {
   BoardType,
   ListType,
   inactiveId,
   flashAnimationDuration,
   ISSUABLE,
+  titleQueries,
+  subscriptionQueries,
 } from '~/boards/constants';
 import { getIdFromGraphQLId } from '~/graphql_shared/utils';
 import createGqClient, { fetchPolicies } from '~/lib/graphql';
 import { convertObjectPropsToCamelCase, urlParamsToObject } from '~/lib/utils/common_utils';
+import { s__ } from '~/locale';
 import {
   formatBoardLists,
   formatListIssues,
@@ -20,18 +25,17 @@ import {
   formatIssueInput,
   updateListPosition,
   transformNotFilters,
+  moveItemListHelper,
+  getMoveData,
 } from '../boards_util';
 import boardLabelsQuery from '../graphql/board_labels.query.graphql';
 import destroyBoardListMutation from '../graphql/board_list_destroy.mutation.graphql';
 import updateBoardListMutation from '../graphql/board_list_update.mutation.graphql';
 import groupProjectsQuery from '../graphql/group_projects.query.graphql';
 import issueCreateMutation from '../graphql/issue_create.mutation.graphql';
-import issueMoveListMutation from '../graphql/issue_move_list.mutation.graphql';
 import issueSetDueDateMutation from '../graphql/issue_set_due_date.mutation.graphql';
 import issueSetLabelsMutation from '../graphql/issue_set_labels.mutation.graphql';
 import issueSetMilestoneMutation from '../graphql/issue_set_milestone.mutation.graphql';
-import issueSetSubscriptionMutation from '../graphql/issue_set_subscription.mutation.graphql';
-import issueSetTitleMutation from '../graphql/issue_set_title.mutation.graphql';
 import listsIssuesQuery from '../graphql/lists_issues.query.graphql';
 import * as types from './mutation_types';
 
@@ -68,6 +72,7 @@ export default {
       'milestoneTitle',
       'releaseTag',
       'search',
+      'myReactionEmoji',
     ]);
     filterParams.not = transformNotFilters(filters);
     commit(types.SET_FILTERS, filterParams);
@@ -326,63 +331,155 @@ export default {
     commit(types.RESET_ISSUES);
   },
 
-  moveItem: ({ dispatch }) => {
-    dispatch('moveIssue');
+  moveItem: ({ dispatch }, payload) => {
+    dispatch('moveIssue', payload);
   },
 
-  moveIssue: (
-    { state, commit },
-    { itemId, itemIid, itemPath, fromListId, toListId, moveBeforeId, moveAfterId },
+  moveIssue: ({ dispatch, state }, params) => {
+    const moveData = getMoveData(state, params);
+
+    dispatch('moveIssueCard', moveData);
+    dispatch('updateMovedIssue', moveData);
+    dispatch('updateIssueOrder', { moveData });
+  },
+
+  moveIssueCard: ({ commit }, moveData) => {
+    const {
+      reordering,
+      shouldClone,
+      itemNotInToList,
+      originalIndex,
+      itemId,
+      fromListId,
+      toListId,
+      moveBeforeId,
+      moveAfterId,
+    } = moveData;
+
+    commit(types.REMOVE_BOARD_ITEM_FROM_LIST, { itemId, listId: fromListId });
+
+    if (reordering) {
+      commit(types.ADD_BOARD_ITEM_TO_LIST, {
+        itemId,
+        listId: toListId,
+        moveBeforeId,
+        moveAfterId,
+      });
+
+      return;
+    }
+
+    if (itemNotInToList) {
+      commit(types.ADD_BOARD_ITEM_TO_LIST, {
+        itemId,
+        listId: toListId,
+        moveBeforeId,
+        moveAfterId,
+      });
+    }
+
+    if (shouldClone) {
+      commit(types.ADD_BOARD_ITEM_TO_LIST, { itemId, listId: fromListId, atIndex: originalIndex });
+    }
+  },
+
+  updateMovedIssue: (
+    { commit, state: { boardItems, boardLists } },
+    { itemId, fromListId, toListId },
   ) => {
-    const originalIssue = state.boardItems[itemId];
-    const fromList = state.boardItemsByListId[fromListId];
-    const originalIndex = fromList.indexOf(Number(itemId));
-    commit(types.MOVE_ISSUE, { originalIssue, fromListId, toListId, moveBeforeId, moveAfterId });
+    const updatedIssue = moveItemListHelper(
+      boardItems[itemId],
+      boardLists[fromListId],
+      boardLists[toListId],
+    );
 
-    const { boardId } = state;
-    const [fullProjectPath] = itemPath.split(/[#]/);
+    commit(types.UPDATE_BOARD_ITEM, updatedIssue);
+  },
 
-    gqlClient
-      .mutate({
+  undoMoveIssueCard: ({ commit }, moveData) => {
+    const {
+      reordering,
+      shouldClone,
+      itemNotInToList,
+      itemId,
+      fromListId,
+      toListId,
+      originalIssue,
+      originalIndex,
+    } = moveData;
+
+    commit(types.UPDATE_BOARD_ITEM, originalIssue);
+
+    if (reordering) {
+      commit(types.REMOVE_BOARD_ITEM_FROM_LIST, { itemId, listId: fromListId });
+      commit(types.ADD_BOARD_ITEM_TO_LIST, { itemId, listId: fromListId, atIndex: originalIndex });
+      return;
+    }
+
+    if (shouldClone) {
+      commit(types.REMOVE_BOARD_ITEM_FROM_LIST, { itemId, listId: fromListId });
+    }
+    if (itemNotInToList) {
+      commit(types.REMOVE_BOARD_ITEM_FROM_LIST, { itemId, listId: toListId });
+    }
+
+    commit(types.ADD_BOARD_ITEM_TO_LIST, { itemId, listId: fromListId, atIndex: originalIndex });
+  },
+
+  updateIssueOrder: async ({ commit, dispatch, state }, { moveData, mutationVariables = {} }) => {
+    try {
+      const { itemId, fromListId, toListId, moveBeforeId, moveAfterId } = moveData;
+      const {
+        boardId,
+        boardItems: {
+          [itemId]: { iid, referencePath },
+        },
+      } = state;
+
+      const { data } = await gqlClient.mutate({
         mutation: issueMoveListMutation,
         variables: {
-          projectPath: fullProjectPath,
+          iid,
+          projectPath: referencePath.split(/[#]/)[0],
           boardId: fullBoardId(boardId),
-          iid: itemIid,
           fromListId: getIdFromGraphQLId(fromListId),
           toListId: getIdFromGraphQLId(toListId),
           moveBeforeId,
           moveAfterId,
+          // 'mutationVariables' allows EE code to pass in extra parameters.
+          ...mutationVariables,
         },
-      })
-      .then(({ data }) => {
-        if (data?.issueMoveList?.errors.length) {
-          throw new Error();
-        } else {
-          const issue = data.issueMoveList?.issue;
-          commit(types.MOVE_ISSUE_SUCCESS, { issue });
-        }
-      })
-      .catch(() =>
-        commit(types.MOVE_ISSUE_FAILURE, { originalIssue, fromListId, toListId, originalIndex }),
+      });
+
+      if (data?.issueMoveList?.errors.length || !data.issueMoveList) {
+        throw new Error('issueMoveList empty');
+      }
+
+      commit(types.MUTATE_ISSUE_SUCCESS, { issue: data.issueMoveList.issue });
+    } catch {
+      commit(
+        types.SET_ERROR,
+        s__('Boards|An error occurred while moving the issue. Please try again.'),
       );
+      dispatch('undoMoveIssueCard', moveData);
+    }
   },
 
   setAssignees: ({ commit, getters }, assigneeUsernames) => {
-    commit('UPDATE_ISSUE_BY_ID', {
-      issueId: getters.activeIssue.id,
+    commit('UPDATE_BOARD_ITEM_BY_ID', {
+      itemId: getters.activeBoardItem.id,
       prop: 'assignees',
       value: assigneeUsernames,
     });
   },
 
   setActiveIssueMilestone: async ({ commit, getters }, input) => {
-    const { activeIssue } = getters;
+    const { activeBoardItem } = getters;
     const { data } = await gqlClient.mutate({
       mutation: issueSetMilestoneMutation,
       variables: {
         input: {
-          iid: String(activeIssue.iid),
+          iid: String(activeBoardItem.iid),
           milestoneId: getIdFromGraphQLId(input.milestoneId),
           projectPath: input.projectPath,
         },
@@ -393,65 +490,71 @@ export default {
       throw new Error(data.updateIssue.errors);
     }
 
-    commit(types.UPDATE_ISSUE_BY_ID, {
-      issueId: activeIssue.id,
+    commit(types.UPDATE_BOARD_ITEM_BY_ID, {
+      itemId: activeBoardItem.id,
       prop: 'milestone',
       value: data.updateIssue.issue.milestone,
     });
   },
 
-  createNewIssue: ({ commit, state }, issueInput) => {
-    const { boardConfig } = state;
+  addListItem: ({ commit }, { list, item, position }) => {
+    commit(types.ADD_BOARD_ITEM_TO_LIST, { listId: list.id, itemId: item.id, atIndex: position });
+    commit(types.UPDATE_BOARD_ITEM, item);
+  },
+
+  removeListItem: ({ commit }, { listId, itemId }) => {
+    commit(types.REMOVE_BOARD_ITEM_FROM_LIST, { listId, itemId });
+    commit(types.REMOVE_BOARD_ITEM, itemId);
+  },
 
+  addListNewIssue: (
+    { state: { boardConfig, boardType, fullPath }, dispatch, commit },
+    { issueInput, list, placeholderId = `tmp-${new Date().getTime()}` },
+  ) => {
     const input = formatIssueInput(issueInput, boardConfig);
 
-    const { boardType, fullPath } = state;
     if (boardType === BoardType.project) {
       input.projectPath = fullPath;
     }
 
-    return gqlClient
+    const placeholderIssue = formatIssue({ ...issueInput, id: placeholderId });
+    dispatch('addListItem', { list, item: placeholderIssue, position: 0 });
+
+    gqlClient
       .mutate({
         mutation: issueCreateMutation,
         variables: { input },
       })
       .then(({ data }) => {
         if (data.createIssue.errors.length) {
-          commit(types.CREATE_ISSUE_FAILURE);
-        } else {
-          return data.createIssue?.issue;
+          throw new Error();
         }
-        return null;
-      })
-      .catch(() => commit(types.CREATE_ISSUE_FAILURE));
-  },
 
-  addListIssue: ({ commit }, { list, issue, position }) => {
-    commit(types.ADD_ISSUE_TO_LIST, { list, issue, position });
+        const rawIssue = data.createIssue?.issue;
+        const formattedIssue = formatIssue({ ...rawIssue, id: getIdFromGraphQLId(rawIssue.id) });
+        dispatch('removeListItem', { listId: list.id, itemId: placeholderId });
+        dispatch('addListItem', { list, item: formattedIssue, position: 0 });
+      })
+      .catch(() => {
+        dispatch('removeListItem', { listId: list.id, itemId: placeholderId });
+        commit(
+          types.SET_ERROR,
+          s__('Boards|An error occurred while creating the issue. Please try again.'),
+        );
+      });
   },
 
-  addListNewIssue: ({ commit, dispatch }, { issueInput, list }) => {
-    const issue = formatIssue({ ...issueInput, id: 'tmp' });
-    commit(types.ADD_ISSUE_TO_LIST, { list, issue, position: 0 });
-
-    dispatch('createNewIssue', issueInput)
-      .then((res) => {
-        commit(types.ADD_ISSUE_TO_LIST, {
-          list,
-          issue: formatIssue({ ...res, id: getIdFromGraphQLId(res.id) }),
-        });
-        commit(types.REMOVE_ISSUE_FROM_LIST, { list, issue });
-      })
-      .catch(() => commit(types.ADD_ISSUE_TO_LIST_FAILURE, { list, issueId: issueInput.id }));
+  setActiveBoardItemLabels: ({ dispatch }, params) => {
+    dispatch('setActiveIssueLabels', params);
   },
 
   setActiveIssueLabels: async ({ commit, getters }, input) => {
-    const { activeIssue } = getters;
+    const { activeBoardItem } = getters;
     const { data } = await gqlClient.mutate({
       mutation: issueSetLabelsMutation,
       variables: {
         input: {
-          iid: String(activeIssue.iid),
+          iid: String(activeBoardItem.iid),
           addLabelIds: input.addLabelIds ?? [],
           removeLabelIds: input.removeLabelIds ?? [],
           projectPath: input.projectPath,
@@ -463,20 +566,20 @@ export default {
       throw new Error(data.updateIssue.errors);
     }
 
-    commit(types.UPDATE_ISSUE_BY_ID, {
-      issueId: activeIssue.id,
+    commit(types.UPDATE_BOARD_ITEM_BY_ID, {
+      itemId: activeBoardItem.id,
       prop: 'labels',
       value: data.updateIssue.issue.labels.nodes,
     });
   },
 
   setActiveIssueDueDate: async ({ commit, getters }, input) => {
-    const { activeIssue } = getters;
+    const { activeBoardItem } = getters;
     const { data } = await gqlClient.mutate({
       mutation: issueSetDueDateMutation,
       variables: {
         input: {
-          iid: String(activeIssue.iid),
+          iid: String(activeBoardItem.iid),
           projectPath: input.projectPath,
           dueDate: input.dueDate,
         },
@@ -487,57 +590,66 @@ export default {
       throw new Error(data.updateIssue.errors);
     }
 
-    commit(types.UPDATE_ISSUE_BY_ID, {
-      issueId: activeIssue.id,
+    commit(types.UPDATE_BOARD_ITEM_BY_ID, {
+      itemId: activeBoardItem.id,
       prop: 'dueDate',
       value: data.updateIssue.issue.dueDate,
     });
   },
 
-  setActiveIssueSubscribed: async ({ commit, getters }, input) => {
+  setActiveItemSubscribed: async ({ commit, getters, state }, input) => {
+    const { activeBoardItem, isEpicBoard } = getters;
+    const { fullPath, issuableType } = state;
+    const workspacePath = isEpicBoard
+      ? { groupPath: fullPath }
+      : { projectPath: input.projectPath };
     const { data } = await gqlClient.mutate({
-      mutation: issueSetSubscriptionMutation,
+      mutation: subscriptionQueries[issuableType].mutation,
       variables: {
         input: {
-          iid: String(getters.activeIssue.iid),
-          projectPath: input.projectPath,
+          ...workspacePath,
+          iid: String(activeBoardItem.iid),
           subscribedState: input.subscribed,
         },
       },
     });
 
-    if (data.issueSetSubscription?.errors?.length > 0) {
-      throw new Error(data.issueSetSubscription.errors);
+    if (data.updateIssuableSubscription?.errors?.length > 0) {
+      throw new Error(data.updateIssuableSubscription[issuableType].errors);
     }
 
-    commit(types.UPDATE_ISSUE_BY_ID, {
-      issueId: getters.activeIssue.id,
+    commit(types.UPDATE_BOARD_ITEM_BY_ID, {
+      itemId: activeBoardItem.id,
       prop: 'subscribed',
-      value: data.issueSetSubscription.issue.subscribed,
+      value: data.updateIssuableSubscription[issuableType].subscribed,
     });
   },
 
-  setActiveIssueTitle: async ({ commit, getters }, input) => {
-    const { activeIssue } = getters;
+  setActiveItemTitle: async ({ commit, getters, state }, input) => {
+    const { activeBoardItem, isEpicBoard } = getters;
+    const { fullPath, issuableType } = state;
+    const workspacePath = isEpicBoard
+      ? { groupPath: fullPath }
+      : { projectPath: input.projectPath };
     const { data } = await gqlClient.mutate({
-      mutation: issueSetTitleMutation,
+      mutation: titleQueries[issuableType].mutation,
       variables: {
         input: {
-          iid: String(activeIssue.iid),
-          projectPath: input.projectPath,
+          ...workspacePath,
+          iid: String(activeBoardItem.iid),
           title: input.title,
         },
       },
     });
 
-    if (data.updateIssue?.errors?.length > 0) {
-      throw new Error(data.updateIssue.errors);
+    if (data.updateIssuableTitle?.errors?.length > 0) {
+      throw new Error(data.updateIssuableTitle.errors);
     }
 
-    commit(types.UPDATE_ISSUE_BY_ID, {
-      issueId: activeIssue.id,
+    commit(types.UPDATE_BOARD_ITEM_BY_ID, {
+      itemId: activeBoardItem.id,
       prop: 'title',
-      value: data.updateIssue.issue.title,
+      value: data.updateIssuableTitle[issuableType].title,
     });
   },
 
@@ -576,10 +688,10 @@ export default {
     const { selectedBoardItems } = state;
     const index = selectedBoardItems.indexOf(boardItem);
 
-    // If user already selected an item (activeIssue) without using mult-select,
+    // If user already selected an item (activeBoardItem) without using mult-select,
     // include that item in the selection and unset state.ActiveId to hide the sidebar.
-    if (getters.activeIssue) {
-      commit(types.ADD_BOARD_ITEM_TO_SELECTION, getters.activeIssue);
+    if (getters.activeBoardItem) {
+      commit(types.ADD_BOARD_ITEM_TO_SELECTION, getters.activeBoardItem);
       dispatch('unsetActiveId');
     }
 
@@ -608,6 +720,18 @@ export default {
     }
   },
 
+  setError: ({ commit }, { message, error, captureError = false }) => {
+    commit(types.SET_ERROR, message);
+
+    if (captureError) {
+      Sentry.captureException(error);
+    }
+  },
+
+  unsetError: ({ commit }) => {
+    commit(types.SET_ERROR, undefined);
+  },
+
   fetchBacklog: () => {
     notImplemented();
   },
diff --git a/app/assets/javascripts/boards/stores/getters.js b/app/assets/javascripts/boards/stores/getters.js
index caa518f91ce..0589851c658 100644
--- a/app/assets/javascripts/boards/stores/getters.js
+++ b/app/assets/javascripts/boards/stores/getters.js
@@ -1,5 +1,5 @@
 import { find } from 'lodash';
-import { BoardType, inactiveId } from '../constants';
+import { BoardType, inactiveId, issuableTypes } from '../constants';
 
 export default {
   isGroupBoard: (state) => state.boardType === BoardType.group,
@@ -15,17 +15,17 @@ export default {
     return listItemsIds.map((id) => getters.getBoardItemById(id));
   },
 
-  activeIssue: (state) => {
+  activeBoardItem: (state) => {
     return state.boardItems[state.activeId] || {};
   },
 
   groupPathForActiveIssue: (_, getters) => {
-    const { referencePath = '' } = getters.activeIssue;
+    const { referencePath = '' } = getters.activeBoardItem;
     return referencePath.slice(0, referencePath.indexOf('/'));
   },
 
   projectPathForActiveIssue: (_, getters) => {
-    const { referencePath = '' } = getters.activeIssue;
+    const { referencePath = '' } = getters.activeBoardItem;
     return referencePath.slice(0, referencePath.indexOf('#'));
   },
 
@@ -44,6 +44,10 @@ export default {
     return find(state.boardLists, (l) => l.title === title);
   },
 
+  isIssueBoard: (state) => {
+    return state.issuableType === issuableTypes.issue;
+  },
+
   isEpicBoard: () => {
     return false;
   },
diff --git a/app/assets/javascripts/boards/stores/modal_store.js b/app/assets/javascripts/boards/stores/modal_store.js
deleted file mode 100644
index 8a8fa61361c..00000000000
--- a/app/assets/javascripts/boards/stores/modal_store.js
+++ /dev/null
@@ -1,95 +0,0 @@
-class ModalStore {
-  constructor() {
-    this.store = {
-      columns: 3,
-      issues: [],
-      issuesCount: false,
-      selectedIssues: [],
-      showAddIssuesModal: false,
-      activeTab: 'all',
-      selectedList: null,
-      searchTerm: '',
-      loading: false,
-      loadingNewPage: false,
-      filterLoading: false,
-      page: 1,
-      perPage: 50,
-      filter: {
-        path: '',
-      },
-    };
-  }
-
-  selectedCount() {
-    return this.getSelectedIssues().length;
-  }
-
-  toggleIssue(issueObj) {
-    const issue = issueObj;
-    const { selected } = issue;
-
-    issue.selected = !selected;
-
-    if (!selected) {
-      this.addSelectedIssue(issue);
-    } else {
-      this.removeSelectedIssue(issue);
-    }
-  }
-
-  toggleAll() {
-    const select = this.selectedCount() !== this.store.issues.length;
-
-    this.store.issues.forEach((issue) => {
-      const issueUpdate = issue;
-
-      if (issueUpdate.selected !== select) {
-        issueUpdate.selected = select;
-
-        if (select) {
-          this.addSelectedIssue(issue);
-        } else {
-          this.removeSelectedIssue(issue);
-        }
-      }
-    });
-  }
-
-  getSelectedIssues() {
-    return this.store.selectedIssues.filter((issue) => issue.selected);
-  }
-
-  addSelectedIssue(issue) {
-    const index = this.selectedIssueIndex(issue);
-
-    if (index === -1) {
-      this.store.selectedIssues.push(issue);
-    }
-  }
-
-  removeSelectedIssue(issue, forcePurge = false) {
-    if (this.store.activeTab === 'all' || forcePurge) {
-      this.store.selectedIssues = this.store.selectedIssues.filter(
-        (fIssue) => fIssue.id !== issue.id,
-      );
-    }
-  }
-
-  purgeUnselectedIssues() {
-    this.store.selectedIssues.forEach((issue) => {
-      if (!issue.selected) {
-        this.removeSelectedIssue(issue, true);
-      }
-    });
-  }
-
-  selectedIssueIndex(issue) {
-    return this.store.selectedIssues.indexOf(issue);
-  }
-
-  findSelectedIssue(issue) {
-    return this.store.selectedIssues.filter((filteredIssue) => filteredIssue.id === issue.id)[0];
-  }
-}
-
-export default new ModalStore();
diff --git a/app/assets/javascripts/boards/stores/mutation_types.js b/app/assets/javascripts/boards/stores/mutation_types.js
index e7c034fb087..22b9905ee62 100644
--- a/app/assets/javascripts/boards/stores/mutation_types.js
+++ b/app/assets/javascripts/boards/stores/mutation_types.js
@@ -20,23 +20,21 @@ export const REMOVE_LIST_FAILURE = 'REMOVE_LIST_FAILURE';
 export const REQUEST_ITEMS_FOR_LIST = 'REQUEST_ITEMS_FOR_LIST';
 export const RECEIVE_ITEMS_FOR_LIST_FAILURE = 'RECEIVE_ITEMS_FOR_LIST_FAILURE';
 export const RECEIVE_ITEMS_FOR_LIST_SUCCESS = 'RECEIVE_ITEMS_FOR_LIST_SUCCESS';
-export const CREATE_ISSUE_FAILURE = 'CREATE_ISSUE_FAILURE';
 export const REQUEST_ADD_ISSUE = 'REQUEST_ADD_ISSUE';
 export const RECEIVE_ADD_ISSUE_SUCCESS = 'RECEIVE_ADD_ISSUE_SUCCESS';
 export const RECEIVE_ADD_ISSUE_ERROR = 'RECEIVE_ADD_ISSUE_ERROR';
-export const MOVE_ISSUE = 'MOVE_ISSUE';
-export const MOVE_ISSUE_SUCCESS = 'MOVE_ISSUE_SUCCESS';
-export const MOVE_ISSUE_FAILURE = 'MOVE_ISSUE_FAILURE';
+export const UPDATE_BOARD_ITEM = 'UPDATE_BOARD_ITEM';
+export const REMOVE_BOARD_ITEM = 'REMOVE_BOARD_ITEM';
 export const REQUEST_UPDATE_ISSUE = 'REQUEST_UPDATE_ISSUE';
+export const MUTATE_ISSUE_SUCCESS = 'MUTATE_ISSUE_SUCCESS';
 export const RECEIVE_UPDATE_ISSUE_SUCCESS = 'RECEIVE_UPDATE_ISSUE_SUCCESS';
 export const RECEIVE_UPDATE_ISSUE_ERROR = 'RECEIVE_UPDATE_ISSUE_ERROR';
-export const ADD_ISSUE_TO_LIST = 'ADD_ISSUE_TO_LIST';
-export const ADD_ISSUE_TO_LIST_FAILURE = 'ADD_ISSUE_TO_LIST_FAILURE';
-export const REMOVE_ISSUE_FROM_LIST = 'REMOVE_ISSUE_FROM_LIST';
+export const ADD_BOARD_ITEM_TO_LIST = 'ADD_BOARD_ITEM_TO_LIST';
+export const REMOVE_BOARD_ITEM_FROM_LIST = 'REMOVE_BOARD_ITEM_FROM_LIST';
 export const SET_CURRENT_PAGE = 'SET_CURRENT_PAGE';
 export const TOGGLE_EMPTY_STATE = 'TOGGLE_EMPTY_STATE';
 export const SET_ACTIVE_ID = 'SET_ACTIVE_ID';
-export const UPDATE_ISSUE_BY_ID = 'UPDATE_ISSUE_BY_ID';
+export const UPDATE_BOARD_ITEM_BY_ID = 'UPDATE_BOARD_ITEM_BY_ID';
 export const SET_ASSIGNEE_LOADING = 'SET_ASSIGNEE_LOADING';
 export const RESET_ISSUES = 'RESET_ISSUES';
 export const REQUEST_GROUP_PROJECTS = 'REQUEST_GROUP_PROJECTS';
@@ -49,3 +47,4 @@ export const SET_ADD_COLUMN_FORM_VISIBLE = 'SET_ADD_COLUMN_FORM_VISIBLE';
 export const ADD_LIST_TO_HIGHLIGHTED_LISTS = 'ADD_LIST_TO_HIGHLIGHTED_LISTS';
 export const REMOVE_LIST_FROM_HIGHLIGHTED_LISTS = 'REMOVE_LIST_FROM_HIGHLIGHTED_LISTS';
 export const RESET_BOARD_ITEM_SELECTION = 'RESET_BOARD_ITEM_SELECTION';
+export const SET_ERROR = 'SET_ERROR';
diff --git a/app/assets/javascripts/boards/stores/mutations.js b/app/assets/javascripts/boards/stores/mutations.js
index 75b60366b6a..561c21b78c1 100644
--- a/app/assets/javascripts/boards/stores/mutations.js
+++ b/app/assets/javascripts/boards/stores/mutations.js
@@ -2,7 +2,7 @@ import { pull, union } from 'lodash';
 import Vue from 'vue';
 import { getIdFromGraphQLId } from '~/graphql_shared/utils';
 import { s__ } from '~/locale';
-import { formatIssue, moveItemListHelper } from '../boards_util';
+import { formatIssue } from '../boards_util';
 import { issuableTypes } from '../constants';
 import * as mutationTypes from './mutation_types';
 
@@ -158,13 +158,13 @@ export default {
     });
   },
 
-  [mutationTypes.UPDATE_ISSUE_BY_ID]: (state, { issueId, prop, value }) => {
-    if (!state.boardItems[issueId]) {
+  [mutationTypes.UPDATE_BOARD_ITEM_BY_ID]: (state, { itemId, prop, value }) => {
+    if (!state.boardItems[itemId]) {
       /* eslint-disable-next-line @gitlab/require-i18n-strings */
       throw new Error('No issue found.');
     }
 
-    Vue.set(state.boardItems[issueId], prop, value);
+    Vue.set(state.boardItems[itemId], prop, value);
   },
 
   [mutationTypes.SET_ASSIGNEE_LOADING](state, isLoading) {
@@ -183,40 +183,11 @@ export default {
     notImplemented();
   },
 
-  [mutationTypes.MOVE_ISSUE]: (
-    state,
-    { originalIssue, fromListId, toListId, moveBeforeId, moveAfterId },
-  ) => {
-    const fromList = state.boardLists[fromListId];
-    const toList = state.boardLists[toListId];
-
-    const issue = moveItemListHelper(originalIssue, fromList, toList);
-    Vue.set(state.boardItems, issue.id, issue);
-
-    removeItemFromList({ state, listId: fromListId, itemId: issue.id });
-    addItemToList({ state, listId: toListId, itemId: issue.id, moveBeforeId, moveAfterId });
-  },
-
-  [mutationTypes.MOVE_ISSUE_SUCCESS]: (state, { issue }) => {
+  [mutationTypes.MUTATE_ISSUE_SUCCESS]: (state, { issue }) => {
     const issueId = getIdFromGraphQLId(issue.id);
     Vue.set(state.boardItems, issueId, formatIssue({ ...issue, id: issueId }));
   },
 
-  [mutationTypes.MOVE_ISSUE_FAILURE]: (
-    state,
-    { originalIssue, fromListId, toListId, originalIndex },
-  ) => {
-    state.error = s__('Boards|An error occurred while moving the issue. Please try again.');
-    Vue.set(state.boardItems, originalIssue.id, originalIssue);
-    removeItemFromList({ state, listId: toListId, itemId: originalIssue.id });
-    addItemToList({
-      state,
-      listId: fromListId,
-      itemId: originalIssue.id,
-      atIndex: originalIndex,
-    });
-  },
-
   [mutationTypes.REQUEST_UPDATE_ISSUE]: () => {
     notImplemented();
   },
@@ -229,28 +200,23 @@ export default {
     notImplemented();
   },
 
-  [mutationTypes.CREATE_ISSUE_FAILURE]: (state) => {
-    state.error = s__('Boards|An error occurred while creating the issue. Please try again.');
+  [mutationTypes.ADD_BOARD_ITEM_TO_LIST]: (
+    state,
+    { itemId, listId, moveBeforeId, moveAfterId, atIndex },
+  ) => {
+    addItemToList({ state, listId, itemId, moveBeforeId, moveAfterId, atIndex });
   },
 
-  [mutationTypes.ADD_ISSUE_TO_LIST]: (state, { list, issue, position }) => {
-    addItemToList({
-      state,
-      listId: list.id,
-      itemId: issue.id,
-      atIndex: position,
-    });
-    Vue.set(state.boardItems, issue.id, issue);
+  [mutationTypes.REMOVE_BOARD_ITEM_FROM_LIST]: (state, { itemId, listId }) => {
+    removeItemFromList({ state, listId, itemId });
   },
 
-  [mutationTypes.ADD_ISSUE_TO_LIST_FAILURE]: (state, { list, issueId }) => {
-    state.error = s__('Boards|An error occurred while creating the issue. Please try again.');
-    removeItemFromList({ state, listId: list.id, itemId: issueId });
+  [mutationTypes.UPDATE_BOARD_ITEM]: (state, item) => {
+    Vue.set(state.boardItems, item.id, item);
   },
 
-  [mutationTypes.REMOVE_ISSUE_FROM_LIST]: (state, { list, issue }) => {
-    removeItemFromList({ state, listId: list.id, itemId: issue.id });
-    Vue.delete(state.boardItems, issue.id);
+  [mutationTypes.REMOVE_BOARD_ITEM]: (state, itemId) => {
+    Vue.delete(state.boardItems, itemId);
   },
 
   [mutationTypes.SET_CURRENT_PAGE]: () => {
@@ -309,4 +275,8 @@ export default {
   [mutationTypes.RESET_BOARD_ITEM_SELECTION]: (state) => {
     state.selectedBoardItems = [];
   },
+
+  [mutationTypes.SET_ERROR]: (state, error) => {
+    state.error = error;
+  },
 };