MacGui: removed unused outlets in PicturePreview.xib.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6377 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: realigned the video quality options.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6378 b64f7644-9d1e-0410-96f1-a4d463321fa5