MacGui: small improvements to HBTitle and HBJob.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6625 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: implement HBPicture.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6626 b64f7644-9d1e-0410-96f1-a4d463321fa5
MacGui: post a notification in HBFilters when a settings is changed.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6627 b64f7644-9d1e-0410-96f1-a4d463321fa5