Remove fixed class from file actions

app/assets/stylesheets/framework/files.scss

@@ -254,7 +254,7 @@ span.idiff {
     margin: 0 10px 0 0;
   }
 
-  .file-actions-fixed {
+  .file-actions {
     white-space: nowrap;
 
     .btn {

app/views/projects/diffs/_file.html.haml

@@ -3,7 +3,7 @@
     = render "projects/diffs/file_header", diff_file: diff_file, blob: blob, diff_commit: diff_commit, project: project, url: "##{file_hash}"
 
     - unless diff_file.submodule?
-      .file-actions-fixed.hidden-xs
+      .file-actions.hidden-xs
         - if blob_text_viewable?(blob)
           = link_to '#', class: 'js-toggle-diff-comments btn active has-tooltip btn-file-option', title: "Toggle comments for this file", disabled: @diff_notes_disabled do
             = icon('comment')