Merge branch 'milestone-tooltip' into 'master'

Add milestone expire date to the right sidebar

## What does this MR do?
Shows milestone expire date tooltip in the sidebar. It also shows the tooltip when sidebar is collapsed.

## Are there points in the code the reviewer needs to double check?
`common_utils.js.coffee` and `milestones_helper.rb` should be reviewed deeply.

## What are the relevant issue numbers?
https://gitlab.com/gitlab-org/gitlab-ce/issues/17355

## Screencast
![zngAcytBWq](/uploads/bd8514506aa5010aef9b081455ee90af/zngAcytBWq.gif)

See merge request !4448

1 files changed, 24 insertions, 0 deletions

diff --git a/app/assets/javascripts/lib/common_utils.js.coffee b/app/assets/javascripts/lib/common_utils.js.coffee
new file mode 100644
index 00000000000..0000e99a650
--- /dev/null
+++ b/app/assets/javascripts/lib/common_utils.js.coffee
@@ -0,0 +1,24 @@
+((w) ->
+
+  jQuery.timefor = (time, suffix, expiredLabel) ->
+
+    return '' unless time
+
+    suffix       or= 'remaining'
+    expiredLabel or= 'Past due'
+
+    jQuery.timeago.settings.allowFuture = yes
+
+    { suffixFromNow } = jQuery.timeago.settings.strings
+    jQuery.timeago.settings.strings.suffixFromNow = suffix
+
+    timefor = $.timeago time
+
+    if timefor.indexOf('ago') > -1
+      timefor = expiredLabel
+
+    jQuery.timeago.settings.strings.suffixFromNow = suffixFromNow
+
+    return timefor
+
+) window