Fixing the fact that X stuff gets put behind the Aqua
menubar under rootless mode.
It makes the first frame to be created to be 23 pixels
shorter than the screen size. The 23 pixels comes from
the MenuBar height under Aqua.
I testing it on my computer and it works. I haven't
tried with multi-monitor mode. We will have to try. I
don't really konw how to test that.
Hopefully my code will work with newer updates of
Let me know what you think