WinGui: Change the Audio Automatic behaviour to be a bit more sane.  When Add All Remaining/Selected is turned on, changing title will now clear down first, then add the preset tracks with the preferred language, then add the remaining after with default settings.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5412 b64f7644-9d1e-0410-96f1-a4d463321fa5