There should be an easy way (for example, a link on the main review request page) to force Review
Board to re-retrieve changeset information from the SCM system. Often, I will update the changeset
description in Perforce after receiving some comments on a review, and I'd like the description on
Review Board to be updated correspondingly. So far the only way I've discovered to do this (short of
manually copying and pasting) is to discard and re-create the review request, which isn't viable
once the review request has been responded to.