WinGui:

WinGui:
- Audio Panel will now remove all audio tracks from the audio list if the source has no tracks. When changing back to a source / title that has audio tracks, it will re-add audio tracks that are setup in the selected preset. If no preset is selected it will not re add any tracks.
- Fix duplicate preset created when importing macgui preset.
- Fix CQ/Filesize/AvgBitrate settings not being set correctly with macgui preset import.

git-svn-id: svn://localhost/HandBrake/trunk@3174 b64f7644-9d1e-0410-96f1-a4d463321fa5