Add descriptive names to group and submitter lists

Review Request #185 — Created Dec. 6, 2007 and submitted

Review Board SVN (deprecated)
This change adds a description column to the groups list and a full-name column to the submitters list.

Also, IE wasn't obeying the "white-space: nowrap" style on the table headings (esp. Pending Reviews), but the widths as I've tweaked them now seem to work better.
Tried it on IE6&7 and Firefox, and made sure that the column widths and the contents looked reasonable.
  1. This looks fine. I'm going to have to rethink some of my upcoming datagrid stuff to better handle column widths, but that's a separate problem.
    I think I'd like to eventually move to the point where you don't even see usernames or group IDs, but that'll require some more changes to the autocompletion stuff and some other areas.