Load ticket recipients from the Reply/Comment action in a dashboard

ticketUpdateRecipients and ticketUpdateScrips waited for widgets to
finish loading by checking document.querySelector('.htmx-indicator')
across the whole page. A saved-search portlet renders a persistent
auto-refresh spinner with that class, so on a dashboard the check never
cleared: the inline Reply/Comment modal never issued its
ShowSimplifiedRecipients (or PreviewScrips) request and the recipients
list stayed empty, while the standalone search results page worked.
Scope the check to the ticket update form so unrelated indicators
elsewhere on the page no longer block it.

Fixes: I#38207

Author: sunnavy

share/static/js/util.js

@@ -1415,7 +1415,7 @@ function checkRefreshState(elt) {
         let previous_data;
         functions.push(function (evt) {
             if (evt && evt.type === 'htmx:load') {
-                if (document.querySelector('.htmx-indicator')) {
+                if (document.querySelector('form[name=TicketUpdate] .htmx-indicator')) {
                     return;
                 }
                 else if (RT.loadListeners) {