Fixed #15569 -- Corrected the numbering updates to inlines when rows are added...

Fixed #15569 -- Corrected the numbering updates to inlines when rows are added and deleted. Thanks to sbaechler for the report, to Arthur de Jong and mk for the work on the patch, and to Karen Tracey for the last minute testing help.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15862 bcc190cf-cafb-0310-a4f2-bffc1f526a37