This change adds a shortcut allowing people who are publishing a review
to publish the review and archive the review request all in one shot.

Testing done:
- Manually tested adding a comment and clicking "Publish and Archive"
  from the banner. Once published, the review request is marked as
  archived. Manually tested adding a comment, clicking "Edit Review" from
  the banner, and clicking "Publish and Archive" from the review dialog
  view. Once published, the review request is marked as archived.
- Added 3 unit tests, which all pass (along with all other tests). One
  scenario creates a new visit and archives the review request. The other
  two scenarios update existing visits from visible to visible, and
  visible to archived.
- Added a javascript test to ensure that onPublishClicked is called with
  the correct values.

Reviewed at https://reviews.reviewboard.org/r/9220/