Emoji panel under the side panel in the merge request
Summary
The emoji panel is under the side panel (see screenshot)
Steps to reproduce
In a merge request, add enough emoji the be close of sidebar
Expected behavior
The emoji panel should be over the side panel
Actual behavior
The panel is under
Relevant logs and/or screenshots
Output of checks
Happened on GitLab Community Edition 8.15.1
Possible fixes
Change the z-index for a higher value of the side panel