[bugfix,user/edit][xs]: correct template so that we show user name of…

… person being edited not user doing the editing.

ckan/templates/user/edit.html

@@ -5,7 +5,7 @@
 
   <py:def function="page_title">${c.user} - Edit - User</py:def>
   <py:def function="page_heading">
-      Edit User: ${c.userobj.display_name}
+      Edit User: ${c.user_name}
   </py:def>
 
   <div py:match="content">