[RP] Close window manager onlast program exit

[benno]

Hi All,

I have just been hacking around with ratpoison so that it will exit
when all windows are closed.

Closing down the window manager when there are no windows left to manage
seems to be logical too me, (but probably not anyone else ;).

Anyway, if anyone else thinks this is useful please let me know and
I'll generate some patches.


Cheers,

Benno