>The form should have a cancel button. And the switch is missing.

Why would you need a cancel button? We almost not have that elsewhere. If you hit the wrong option in the message view toolbar, simply hit back button of browser. It will be much faster to get back the previous page than to go at the server to get it. But, if you think that is really required, we can add one. It would simply go back to the message I guess.

What about the switch?