The review detail page is huge and ugly and multi-tentacled. This change

attempts to clean things up just a little bit, by creating some classes for the

various types of "entries" (the review and change boxes).
This is primarily code motion, but I did discover an obscure bug while I was

doing this related to default expansion for draft reply comments (the entry

variable was never assigned in that case, leaving it to be whatever it was

before).
There's obviously a ton more that could be done here, but I want to take this

one step at a time.

Verified the appearance of the review detail page with multiple reviews,

replies, and change descriptions. Everything works as it did before.