GPencil: Refactor Append operators

Now the operators work like other areas of Blender using the list of selected objects.

Also, the name has been changed to:

```Layers:
- Copy Layer to Selected
- Copy All Layers to Selected

Materials:
- Copy Material to Selected
- Copy All Materials to Selected```

Reviewed By: mendio, pablovazquez, pepeland

Differential Revision: https://developer.blender.org/D11216

1 files changed, 8 insertions, 6 deletions

diff --git a/release/scripts/startup/bl_ui/properties_material_gpencil.py b/release/scripts/startup/bl_ui/properties_material_gpencil.py
index ed5863b463a..9d099ff2231 100644
--- a/release/scripts/startup/bl_ui/properties_material_gpencil.py
+++ b/release/scripts/startup/bl_ui/properties_material_gpencil.py
@@ -46,16 +46,18 @@ class GPENCIL_MT_material_context_menu(Menu):
 
         layout.separator()
 
-        layout.operator("object.material_slot_remove_unused")
-        layout.operator("gpencil.stroke_merge_material", text="Merge Similar")
-
-        layout.separator()
         layout.operator("gpencil.material_to_vertex_color", text="Convert Materials to Vertex Color")
         layout.operator("gpencil.extract_palette_vertex", text="Extract Palette from Vertex Color")
 
         layout.separator()
-        layout.menu("VIEW3D_MT_gpencil_append_active_material")
-        layout.menu("VIEW3D_MT_gpencil_append_all_materials")
+
+        layout.operator("gpencil.materials_copy_to_object", text="Copy Material to Selected").only_active = True
+        layout.operator("gpencil.materials_copy_to_object", text="Copy All Materials to Selected").only_active = False
+
+        layout.separator()
+
+        layout.operator("gpencil.stroke_merge_material", text="Merge Similar")
+        layout.operator("object.material_slot_remove_unused")
 
 
 class GPENCIL_UL_matslots(UIList):