Moved Toggle Visibility to MainWindow

Simple change, other more drastic changes were moved to another branch--I'll be working on that branch until I get a working model else i'll move back here.
Merge branch 'master' of github.com:u8sand/Baka-MPlayer

Conflicts:
	Baka MPlayer/playlistmanager.h
	Baka MPlayer/windows/MainWindow.OLD.cpp

Fixed it up so that it compiles and works (somewhat) with the new ui, was able to recycle basically all the existing code. I'll need to add some new code however to manage the new workflow. I'll need to find out how exactly things are supposed to work. At the moment, the ancors don't seem to be in place.