tomxplayer: add option for semi-transparent on unfocus
tomxplayer: add option for semi-transparent on unfocus

-This option allow the video render window to become
semi-transparent when the form does not have inputfocus. That
way any OS menus that should be overlaying the render window
can be seen and used underneath it. The parts of the
menu that are underneath are alpha blended with the running video.

Meticulus/tactical,Meticulus/tactical,Meticulus/tacticalProxy,Meticulus/tactical,Meticulus/tactical