Fixed #8058 -- Moved media for filter_vertical/filter_horizontal widget to the widget for use outside the admin. This also corrects RelatedFieldWidgetWrapper to expose the media of the wrapped widget. Thanks Erwin for the report and cgrady and ramikassab for the complete patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8764 bcc190cf-cafb-0310-a4f2-bffc1f526a37