*feature request* Add Cancel button to Advanced Edit

When you edit / create a post with the 'advanced' editor (click go advanced) you only have the option to save or preview your edit your post which is fine most of the time, but occasionally i decide that i don't want to post / edit what i was going to...

A cancel button that takes me back to the thread or (if the thread was opened in a new tab) the main page / subscriptions etc.

Dear intel,Already Made My Decision
Never trust a computer you can't repair yourself.
Windows Vista - Viruses Intruders Spyware Trojans Adware
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scientology has been getting alot of attention recently

When the rich wage war, it is the poor who die.
Where are the WMD's that our governments used to justify the war?