Init popup for new code comment (#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/features/repo-diff.js

@@ -3,6 +3,7 @@ import {initCompReactionSelector} from './comp/ReactionSelector.js';
 import {initRepoIssueContentHistory} from './repo-issue-content.js';
 import {validateTextareaNonEmpty} from './comp/EasyMDE.js';
 import {initViewedCheckboxListenerFor, countAndUpdateViewedFiles} from './pull-view-file.js';
+import {initPopup} from './common-global.js';
 
 const {csrfToken} = window.config;
 
@@ -52,6 +53,7 @@ export function initRepoDiffConversationForm() {
     const newConversationHolder = $(await $.post(form.attr('action'), form.serialize()));
     const {path, side, idx} = newConversationHolder.data();
 
+    initPopup(newConversationHolder.find('.tooltip'));
     form.closest('.conversation-holder').replaceWith(newConversationHolder);
     if (form.closest('tr').data('line-type') === 'same') {
       $(`[data-path="${path}"] a.add-code-comment[data-idx="${idx}"]`).addClass('invisible');