Add ability to cancel the revision submission process.
Fix undefined variable and index.
Make sure prevalidator results are shown to the user.
The revision object takes care of deleting the attachment.
Redirect user back to post containing results after restesting EPV/MPV/AutoMOD
Add hashes to various queue item links.
Merge branch 'ascraeus' into develop

* ascraeus:
  Add hashes to various queue item links.
  Redirect user back to post containing results after restesting EPV/MPV/AutoMOD
  The revision object takes care of deleting the attachment.
  Make sure prevalidator results are shown to the user.
  Fix undefined variable and index.
  Add ability to cancel the revision submission process.