Mark item as updated when undelete had no effect

Usually if the dataset was not deleted or if it was purged and un-deleting does not do anything

lib/galaxy/webapps/galaxy/services/history_contents.py

@@ -1445,6 +1445,9 @@ def _undelete(self, item: HistoryItemModel):
             raise exceptions.ItemDeletionException("This item has been permanently deleted and cannot be recovered.")
         manager = self._get_item_manager(item)
         manager.undelete(item, flush=self.flush)
+        # Again, we need to force an update in the edge case where all selected items are already undeleted
+        # or when the item was purged as undelete will not trigger an update
+        item.update()
 
     def _purge(self, item: HistoryItemModel, trans: ProvidesHistoryContext):
         if getattr(item, "purged", False):