[Dev] editor windows

[James Paige]

Hey, I just noticed a problem with the motherhamster editor windows 
while I was playing around with CrabGrab.

On my Linux box, the contents of the gameplay window is ALWAYS drawn on 
top of everything else, even if the editor windows are supposed to 
overlap it. Note that the game window's chrome is behaving okay, just 
the game window contents is always on top.

I don't remember anything like this happening before, so maybe it is 
because I am using the opengl-accelrated Compiz window manager now...

---
James