Add file attachment comments to review draft

Review Request #3259 — Created Aug. 3, 2012 and submitted — Latest diff uploaded

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Besides adding the file attachment comments, this changeset fixes the issue display inside a review box. I noticed that when having multiple issues opened on different types of comments, the issue_indicator div wasn't always populated correctly (due to the fact that the comment id wasn't unique). Adding the comment type beside the comment id prevents this problem.
manual check
manage.py test