Fixed various problems
Pressing play button reloading last file - fixed
InputDialog message - fixed
Finished Subtitle support (changing/adding new)
Also added code for playlist manipulation though it doesn't work yet, i'll need to look through the qt documentation more.
Commented out X11Info code, though it's in the documentation I'm qt is not recognizing the module. The reason compositor wasn't detected is because the define Q_WS_X11 no longer exists in qt.