refactor: clean up legacy templates and js (#39808)

* Remove unused `"root"` data attributes from templates
* Use our "confirmModal" as much as possible (partially for #39643)
* Use "data-global-init" to refactor a lot of legacy code
* Refactor and clearify initRepoIssueCommentDelete's behavior to help #36862
* Remove dead code `common-organization.ts`

templates/admin/stacktrace.tmpl

@@ -11,8 +11,8 @@
 	{{if .ProcessStacks}}
 	<div class="ui attached segment">
 		<div class="ui relaxed divided list">
-			{{range .ProcessStacks}}
-				{{template "admin/stacktrace-row" dict "Process" . "root" $}}
+			{{range $process := .ProcessStacks}}
+				{{template "admin/stacktrace-row" dict "Process" $process}}
 			{{end}}
 		</div>
 	</div>