Split the queued batch status into queued and sending statuses. This lets
the user make requests before sending, but freezes the batch data when
cron is sending it.
Fixed the bug where creating a new batch from an old batch duplicated the
most recent batch, no matter which one you were intending to duplicate.
Altered the list of grades that can be given as overrides.
Added a button to the batch archive page on each of the other pages.
Added instructions and error messages to the override page.
Added instructions and error messages to the override page, queued page and transfer results page.