Refactored memset calls in QSV encoder
Implemented selectable color space matrix in QSV encoder
Fixed an issue where a cropped source can be moved while dragging it from outside of its visible area
Removed an unnecessary test in WindowStuff::GetItemModifyType
Actually use selectable color space matrix in QSV encoder
Use proper program files paths, do not prompt for install directory.
Fix crash when adding scene with no scenes and preview running