Fixed #17218 -- Fixed bug with SelectFilter where the 'to' box had a height=0...

Fixed #17218 -- Fixed bug with SelectFilter where the 'to' box had a height=0 when it was within a collapsed fieldset. Thanks jimallman

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17181 bcc190cf-cafb-0310-a4f2-bffc1f526a37