Merge branch 'bugfix/add_hover_to_trash_icon' into 'master'

Add hover to trash icon in notes

## What does this MR do?

Adds hover to trash icon in notes (fixes a ~regression).

## Screenshots (if relevant)

### Before
![Peek_2016-10-20_16-02](/uploads/5b7b94e0a0a3cd7c33d60084ff364f42/Peek_2016-10-20_16-02.gif)

### After
![Peek_2016-10-20_16-01](/uploads/b365eea616efdb7de98900e2925a4813/Peek_2016-10-20_16-01.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [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 it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #23487

See merge request !7008

CHANGELOG.md

@@ -4,6 +4,7 @@ Please view this file on the master branch, on stable branches it's out of date.
   - Adds user project membership expired event to clarify why user was removed (Callum Dryden)
   - Trim leading and trailing whitespace on project_path (Linus Thiel)
   - Fix HipChat notifications rendering (airatshigapov, eisnerd)
+  - Add hover to trash icon in notes !7008 (blackst0ne)
   - Simpler arguments passed to named_route on toggle_award_url helper method
   - Fix: Backup restore doesn't clear cache
 

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

@@ -57,7 +57,7 @@
                 = link_to '#', title: 'Edit comment', class: 'note-action-button js-note-edit' do
                   = 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')
+                  = icon('trash-o', class: 'danger-highlight')
       .note-body{class: note_editable ? 'js-task-list-container' : ''}
         .note-text.md
           = preserve do