[com_menus] - wrong group by when multilanguages enabled - postgresql

Pull Request for fix regression from #12051 .

Summary of Changes

fixed wrong group by when multilanguages enabled

Testing Instructions

latest staging fresh multilanguage install

Go to Menu -> All menu items

administrator/components/com_menus/models/items.php

@@ -273,7 +273,7 @@ protected function getListQuery()
 			$query->select('COUNT(asso2.id)>1 as association')
 				->join('LEFT', '#__associations AS asso ON asso.id = a.id AND asso.context=' . $db->quote('com_menus.item'))
 				->join('LEFT', '#__associations AS asso2 ON asso2.key = asso.key')
-				->group('a.id, e.enabled, l.title, l.image, u.name, c.element, ag.title, e.name, mt.id, mt.title');
+				->group('a.id, e.enabled, l.title, l.image, u.name, c.element, ag.title, e.name, mt.id, mt.title, l.sef');
 		}
 
 		// Join over the extensions