Fix display of the "permission denied" box.
Review Request #5981 — Created June 11, 2014 and submitted
The box for the permission denied message was missing some elements, which made
it look very ugly. This fixes that.
Anonymously looked at a review request with anon access turned off.
This is a review from Review Bot. Tool: PEP8 Style Checker Processed Files: Ignored Files: reviewboard/templates/reviews/review_request_permission_denied.html