Merge branch '27614-fix-karma-ajax-fail' into 'master'

Fix Karma failures for jQuery deferreds

See merge request !11134

app/assets/javascripts/notes.js

@@ -1356,7 +1356,7 @@ const normalizeNewlines = function(str) {
 
       // Show updated comment content temporarily
       $noteBodyText.html(formContent);
-      $editingNote.removeClass('is-editing').addClass('being-posted fade-in-half');
+      $editingNote.removeClass('is-editing fade-in-full').addClass('being-posted fade-in-half');
       $editingNote.find('.note-headline-meta a').html('<i class="fa fa-spinner fa-spin" aria-label="Comment is being updated" aria-hidden="true"></i>');
 
       /* eslint-disable promise/catch-or-return */