Fix a series of breakages noticed while browsing as anonymous.
While accidentally logged out, I noticed a few breakages with review

requests.
First off, everything was editable, and many things were not responding

or loading correctly. This was due to a misplaced </div>, which caused

elements to not appear where they were expected, breaking a bunch of

lookups. That has been fixed.
One glaring problem was that the expand/collapse buttons were flat-out

missing. This is actually noticed while loading any review request at

first, until the JavaScript loads. This was easily fixed by giving them

default icons matching their initial state.
I was also able to edit (or attempt to edit) review requests. Our

'editable' state only considered whether the review request was opened

or closed, not whether the user had access. It now considers whether the

requesting user has edit permissions or owns it.

Browsed around as an anonymous user, as a logged in user with edit

access, and as an anonymous user without edit access.