Add support for working file attachment comments.
Review Request #2380 — Created May 25, 2011 and submitted
Add support for working file attachment comments. Commenting on a file attachment now works much like diffs and screenshots, with a comment dialog and a list of existing comments. File attachments only have comments made on them as a whole. We may want to change the UI a bit later, perhaps indicate draft comments visually like we do with other comment flags. For now, though, this gives us something we can test with.
Commented on a few different files. I was able to add and change the comment, see existing comments made, and see them in the review.