refactor: issue comment context menu and buttons (#39771)

1. Support show "Quote reply" shortcut in help menu, fix the TODO
2. Help #36862 to reuse existing "issue/comment context menu"

web_src/js/features/repo-legacy.ts

@@ -42,13 +42,13 @@ export function initRepository() {
   registerGlobalInitFunc('initRepoPullRequestUpdate', initRepoPullRequestUpdate);
   registerGlobalInitFunc('initRepoCitationPanel', initRepoCitationPanel);
 
+  // TODO: need to refactor more legacy if-querySelector-based "init" code to "data-global-xxx" framework in the future.
   const pageContent = document.querySelector('.page-content.repository');
   if (!pageContent) return;
 
   initRepoBranchTagSelector();
   initRepoCommentFormAndSidebar();
 
-  // Labels
   initCompLabelEdit('.page-content.repository.labels');
   initRepoMilestone();
   initRepoNew();
@@ -57,18 +57,17 @@ export function initRepository() {
   initRepoSettings();
   initRepoIssueWipNewTitle();
 
-  // Issues
-  if (pageContent.matches('.page-content.repository.view.issue')) {
-    initRepoIssueCommentEdit();
+  initRepoIssueCommentEdit();
+  initRepoIssueCommentDelete();
+  initRepoIssueCodeCommentCancel();
 
+  if (pageContent.matches('.page-content.repository.view.issue')) {
     initRepoIssueTitleEdit();
     initRepoIssueWipToggle();
     initRepoIssueComments();
 
     initRepoIssueReferenceIssue();
 
-    initRepoIssueCommentDelete();
-    initRepoIssueCodeCommentCancel();
     initCompReactionSelector();
   }