[Xmonad] darcs patch: first shot at a floating layer

[Bruce Stephens]

dons at cse.unsw.edu.au (Donald Bruce Stewart) writes:

[...]

> I note that by explicitly unmanaging a window, and using float mode to
> move it into the gap, you can set any client whatsoerver as sticky/
> statusbar:
>
>         , ((modMask .|. shiftMask,  xK_u    ), withFocused unmanage) 

Ah, cool.  That's probably what I want.