Fix the display of the review request permission denied page.

Review Request #7642 — Created Sept. 18, 2015 and submitted — Latest diff uploaded

Information

Review Board
release-2.5.x
5456033...

Reviewers

The template for the review request permission denied page had a bunch of extra
markup that was breaking the box. This fixes it.

While I was in here, I noticed that our 403 handler (which should hopefully
never be used) had some TODO text. I've fixed that up too.

Looked at the permission denied page and saw that things looked pretty.