Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

movie player: watch keypath instead of notification to update the time fields, since this is the correct event

Resolves some re-drawing issues and slightly reduces the load

Using UTExportedTypeDeclarations instead of UTImportedTypeDeclarations to properly allow other apps to open files in VLC. Added extension to types as well.
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

Fixes missing / incorrect artwork, improves labelling