backoffice: don't run mass actions on anonymised forms (#54830)

wcs/backoffice/management.py

@@ -2124,6 +2124,8 @@ class FormPage(Directory):
     def submit_multi(self, action, selected_filter, query, criterias):
         item_ids = get_request().form['select[]']
         if '_all' in item_ids:
+            if get_publisher().is_using_postgresql():
+                criterias.append(Null('anonymised'))
             item_ids = FormDefUI(self.formdef).get_listing_item_ids(
                 selected_filter, user=get_request().user, query=query, criterias=criterias
             )