Aero to borderless

Designing W7 Visual style continues. Testing what can be done with the borders when we disable blur.

Removing edges completely, and adding only shadows (replacing the borders), adds some problems to child-windows (no whitespace between edges, MS with their random padding), but other than that it's quite good.

Because dwm, even antialias and alpha channels can be used in the rounded edges as the blur is gone and there is no need to use solid edges.

I probably have to add whitespace to the caption font, as the titlebar contains shadow and so the text is almost attached to the edge. Text can not be moved without making the titlebar bigger.

PS. disabling blur is done by using dwm core files from W7 betas and running debugging code that disables blur (that the betas allowed).