A new logout dialog (v2)

[Manu Cornet]

Hi !

> > There might be some label that's better than nothing, but I think 
> > "Session Management" is quite a bit worse than nothing.
> 
> I was going to make a note that I've put a random title to the mockup
> but I thought it was clear that's a mockup, next time I'll use "Abcdefgh
> ijkl"

Huh, right. Oops. I was just very stupidly doing what I was told :) I'll
change that into "Exit", which seems fine to me. But I still need to
figure out how to make the faded out background to redraw when tooltips
disappear (if anyone has a clue, be welcome to mail me !).

Cheers,
Manu