message: Fix Toggle Files button /2
diff: @@ -6,7 +6,7 @@ import observeEl from '../libs/simplified-element-observer';
  function addButton() {
  const filesHeader = select('.commit-tease .float-right');
  - if (!filesHeader) {
  + if (!filesHeader || select.exists('.rgh-toggle-files')) {
  return;
  }
  filesHeader.append(
  