MacGui: removed an unnecessary NSBox in the Advanced tab.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6345 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: fixed auto naming for dvd sources.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6346 b64f7644-9d1e-0410-96f1-a4d463321fa5