Init popup for new code comment (#20234) (#20235)

- Backport #20234
 
  - Initialize the popup for the tooltip inside the new code comment.
  - This works and is good enough to have this issue fixed for 1.17
 
Fix #20068

web_src/js/index.js

@@ -55,6 +55,7 @@ import {
   initGlobalEnterQuickSubmit,
   initGlobalFormDirtyLeaveConfirm,
   initGlobalLinkActions,
+  initGlobalPopups,
   initHeadNavbarContentToggle,
 } from './features/common-global.js';
 import {initRepoTopicBar} from './features/repo-home.js';
@@ -99,6 +100,7 @@ initVueEnv();
 $(document).ready(() => {
   initGlobalCommon();
 
+  initGlobalPopups();
   initGlobalButtonClickOnEnter();
   initGlobalButtons();
   initGlobalCopyToClipboardListener();