At the moment, when you are adding a signing profile, if you hit enter, it acts as if you hit "Cancel". This is very backwards, and is causing me quite a bit of frustration. A switch to enter=create would be extremely welcomed.
I've pushed a fix for this to staging so it should be live soon. I've also hooked up the 'esc' key to exit dialogues, which I'd been meaning to do for a little while now.