Fixes #38747 - Load hostgroup data on page load

(Actually, the code was written by Maria - thank you very much)
Co-Authored-by: MariaAga <mariaaga@redhat.com>

Author: sbernhard

app/assets/javascripts/host_edit.js

@@ -1,12 +1,15 @@
 //= require parameter_override
 var compute_resource_id = null;
 
+var isInitialLoad = true;
 $(document).on('ContentLoad', function() {
   var searchParams = new URLSearchParams(window.location.search);
-  if(searchParams.has('hostgroup_id')) {
+  if(searchParams.has('hostgroup_id') && isInitialLoad) {
     var param = searchParams.get('hostgroup_id');
     $('#host_hostgroup_id').val(param).trigger('change');
+    hostgroup_changed($('#host_hostgroup_id'));
   }
+  isInitialLoad=false;
   onHostEditLoad();
   const overrideButtons = document.querySelectorAll('[name=is_overridden_btn]');
   overrideButtons.forEach(button =>