Fullscreen monitor output reopened

The bug from #2340 (closed) seems to have returned. When going fullscreen on a second monitor, the output is directed to the primary display, and not the intended second display.

I tested against this build: http://forum.videolan.org/viewtopic.php?f=14&t=55755

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information