message: Enable Open All Notifications button in repo-specific views
diff: import {h} from 'dom-chef';
  import select from 'select-dom';
  import delegate from 'delegate';
  +import {groupButtons} from '../libs/utils';
  import {isNotifications} from '../libs/page-detect';
  function openNotifications() {
  @@ -24,13 +25,12 @@ export default function () {
  return;
  }
  - const openButton = <a href="#open_all_in_tabs" class="btn btn-sm BtnGroup-item">Open all unread in tabs</a>;
  + const openButton = <a href="#open_all_in_tabs" class="btn btn-sm">Open all unread in tabs</a>;
  // Make a button group
  - const markAsReadButton = select('[href="#mark_as_read_confirm_box"]');
  - markAsReadButton.parentNode.classList.add('BtnGroup');
  - markAsReadButton.classList.add('BtnGroup-item');
  - markAsReadButton.before(openButton);
  + const group = select('.tabnav .float-right');
  + group.prepend(openButton);
  + groupButtons([...group.children]);
  // Move out the extra node that messes with .BtnGroup-item:last-child
  document.body.append(select('#mark_as_read_confirm_box'));
  