Fix some user and group links

Review Request #402 — Created June 5, 2008 and submitted — Latest diff uploaded


Review Board SVN (deprecated)


This fixes links in two places:

1. In the submitter list, everything was linking to /users/<id>/, but it should be /users/<username>/.
2. In the review request box, group links were empty, because the url tag needed another parameter.
Verified that those links now show up properly, and AFAICT I didn't break links elsewhere.