[1.1.X] Fixed #6191, #11296 -- Modified the admin deletion confirmation page...

[1.1.X] Fixed #6191, #11296 -- Modified the admin deletion confirmation page to use the same object collection scheme as the actual deletion. This ensures that all objects that may be deleted are actually deleted, and that cyclic display problems are avoided. Thanks to carljm for the patch.

Backport of r12598 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12600 bcc190cf-cafb-0310-a4f2-bffc1f526a37