ABORT button

[nhahn]

I want an ABORT button.  For when you unintentionally do something which freezes the interface. 

So I don't have to wait 10 minutes for the 2 million vectors to show up that I didn't really want, like right now. And then wait 10 more minutes for 2 clicks to undo what I did.

EDIT: very often these seem to be slamming one processor but leaving the others alone.  For example, I'm typing this in firefox while CFD chugs.  So shoudn't there be some way to use multithreading to enable this without having to kill the interface?