Fixed #5385 -- Made the date returned from the calendar picker consistent with...

Fixed #5385 -- Made the date returned from the calendar picker consistent with the usual format of dates in the admin. Thanks Petr Marhoun for the ticket and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8390 bcc190cf-cafb-0310-a4f2-bffc1f526a37