Issue 3532: Linking to a collapsed review does not expand the review

Linking to a collapsed review does not expand the review. Fixed by parsing the
url and force the linked box to open.

Testing Done:
- Tested on local server, add /#review{review_id} to url will trigger the
  corresponding box to open.
- All unit tests passed.

Bugs closed: 3532

Reviewed at https://reviews.reviewboard.org/r/6332/