#2 Unlock mouse

[Anonymous]

I would like to see an "unlock mouse cursor" command. This will
allow me to go to another window, without quiting cube. This is
useful when you need to read the cube documentation about map
editing (for example).

I think that something similar to Quad [1] solution is good. It will be
REALLY useful.

[1] http://www.cursesandepithets.com/?section=quad