Steps to reproduce:

1. Monitoring -> Problems press Update on any of problems
2. Copy the URL. It must be something like : 
   zabbix.php?action=popup&popup_action=acknowledge.edit&eventids[]=12
3. Create URL widget and add the copied URL.
4. Result : popup is not opened: 
   

Popup will appear if 'Use iframe sandboxing' is with flag false or contains exceptions => 'allow-scripts allow-same-origin allow-forms'

After implementing ZBXNEXT-9340 the scope of this task is expanding to a larger list of configuration forms. 

For example, forms which could have been opened in standalone page (e.g. host edit form) can no longer be opened using this widget. 

Expected:
Configuration form is opened in URL widget