Make time labels right aligned
Visual Facelift: Implement gray theme

I'm not happy with the buttons, but it's ok for now.
Implement screen blanking/freezing
UI Polish

* Buttons only enabled when useful
* Save the selected screen
* React on added/removed screens
Fix screen blanking for Windows 8/8.1

Win8 chokes on our invocation of SetWindowPos and hides the window, even
though MSDN tells us to use SWP_NOSIZE|SWP_NOMOVE, so the coordinates
will be ignored. Win7 got it right, and fortunately, Win8 cooperates
when we pass the window geometry in SetWindowPos.