Merge branch...

Merge branch '249785-replace-bstooltip-with-gltooltip-in-app-assets-javascripts-boards-toggle_focus-js' into 'master'

Replace BSTooltip with GlTooltip in app/assets/javascripts/boards/toggle_focus.js

See merge request gitlab-org/gitlab!45666

app/assets/javascripts/boards/toggle_focus.js

 import $ from 'jquery';
 import Vue from 'vue';
 import { GlIcon } from '@gitlab/ui';
+import { hide } from '~/tooltips';
 
 export default (ModalStore, boardsStore) => {
   const issueBoardsContent = document.querySelector('.content-wrapper > .js-focus-mode-board');
@@ -17,7 +18,9 @@ export default (ModalStore, boardsStore) => {
     },
     methods: {
       toggleFocusMode() {
-        $(this.$refs.toggleFocusModeButton).tooltip('hide');
+        const $el = $(this.$refs.toggleFocusModeButton);
+        hide($el);
+
         issueBoardsContent.classList.toggle('is-focused');
 
         this.isFullscreen = !this.isFullscreen;