Feature - Implemented CCS Editor: cancel button?

I'm fairly sure this has come up before, but searching didn't seem to reveal any previous feature requests for this. As it stands, the only way (as far as I know) to cancel a CCS edit is to exit Mafia altogether, and that seems counterintuitive.

I humbly request that you add a button to the editor that just exits editing mode.

Duplicate of http://kolmafia.us/showthread.php?3835-Cancel-from-CCS-edit; implemented in r8456.