Don't show comment button in gutter of diffs on MR discussion tab

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.10.2 (unreleased)
+  - Don't show comment button in gutter of diffs on MR discussion tab
 
 v 8.10.1
   - Refactor repository storages documentation. !5428

app/assets/javascripts/files_comment_button.js.coffee

@@ -16,7 +16,7 @@ class @FilesCommentButton
 
     debounce = _.debounce @render, DEBOUNCE_TIMEOUT_DURATION
 
-    $(document)
+    $(@filesContainerElement)
       .off 'mouseover', LINE_COLUMN_CLASSES
       .off 'mouseleave', LINE_COLUMN_CLASSES
       .on 'mouseover', LINE_COLUMN_CLASSES, debounce