LinGui: fix deprecated GtkTable, GtkHBox, GtkVBox, GtkHSeparator
GtkTable      -> GtkGrid
GtkHBox       -> GtkBox
GtkVBox       -> GtkBox
GtkHSeparator -> GtkSeparator


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5981 b64f7644-9d1e-0410-96f1-a4d463321fa5