[1.1.X] Fixed #12707. Admin action messages are no longer displayed when...

[1.1.X] Fixed #12707. Admin action messages are no longer displayed when submitting list_editable content. Thanks, copelco. 

and 

Fixed #12962: Made admin delete action work again. Thanks ptone, skevy, mlavin and anyone else I've missed. 

r12525 and r12813 from trunk, together to avoid the regression introduced by r12525 alone.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12815 bcc190cf-cafb-0310-a4f2-bffc1f526a37