Merge branch 'add-hover-color-emoji-icon' into 'master'

Add hover color to emoji icon

## What does this MR do?
Adds hover color to emoji icon in discussions

## Are there points in the code the reviewer needs to double check?
Shouldn't be

## Why was this MR needed?
Keep consistency of color highlighting to indicate action icon

## What are the relevant issue numbers?
Closes #20629 

## Screenshots (if relevant)
Before:
![Gcy0V4Cjp9](/uploads/96a7a683fe2d526b74a05d7cc91c9fa0/Gcy0V4Cjp9.gif)
After:
![TAmusA6o1z](/uploads/1baf20390d2f1442b5fae84ae42914ce/TAmusA6o1z.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5673

CHANGELOG

@@ -5,6 +5,7 @@ v 8.12.0 (unreleased)
   - Change merge_error column from string to text type
   - Add `web_url` field to issue, merge request, and snippet API objects (Ben Boeckel)
   - Set path for all JavaScript cookies to honor GitLab's subdirectory setting !5627 (Mike Greiling)
+  - Add hover color to emoji icon (ClemMakesApps)
   - Optimistic locking for Issues and Merge Requests (title and description overriding prevention)
   - Add `wiki_page_events` to project hook APIs (Ben Boeckel)
   - Remove Gitorious import

app/assets/stylesheets/pages/notes.scss

@@ -281,22 +281,16 @@ ul.notes {
     font-size: 17px;
   }
 
-  &.js-note-delete {
-    i {
   &:hover {
+    .danger-highlight {
       color: $gl-text-red;
     }
-    }
-  }
 
-  &.js-note-edit {
-    i {
-      &:hover {
+    .link-highlight {
       color: $gl-link-color;
     }
   }
 }
-}
 
 .discussion-toggle-button {
   line-height: 20px;

app/views/projects/notes/_note.html.haml

@@ -52,11 +52,11 @@
               - if note.emoji_awardable?
                 = link_to '#', title: 'Award Emoji', class: 'note-action-button note-emoji-button js-add-award js-note-emoji', data: { position: 'right' } do
                   = icon('spinner spin')
-                  = icon('smile-o')
+                  = icon('smile-o', class: 'link-highlight')
 
               - if note_editable
                 = link_to '#', title: 'Edit comment', class: 'note-action-button js-note-edit' do
-                  = icon('pencil')
+                  = icon('pencil', class: 'link-highlight')
                 = link_to namespace_project_note_path(note.project.namespace, note.project, note), title: 'Remove comment', method: :delete, data: { confirm: 'Are you sure you want to remove this comment?' }, remote: true, class: 'note-action-button hidden-xs js-note-delete danger' do
                   = icon('trash-o')
       .note-body{class: note_editable ? 'js-task-list-container' : ''}

spec/javascripts/fixtures/awards_handler.html.haml

@@ -39,7 +39,7 @@
                     %span.note-role Reporter
                     %a.note-action-button.note-emoji-button.js-add-award.js-note-emoji{"data-position" => "right", :href => "#", :title => "Award Emoji"}
                       %i.fa.fa-spinner.fa-spin
-                      %i.fa.fa-smile-o
+                      %i.fa.fa-smile-o.link-highlight
                 .js-task-list-container.note-body.is-task-list-enabled
                   .note-text
                     %p Suscipit sunt quia quisquam sed eveniet ipsam.