MacGui: Fix peak framerate and custom resolution for new presets which was borked...

MacGui: Fix peak framerate and custom resolution for new presets which was borked in 3532 due to those enhancements being after the audio work was done on an out of date xib ... fixed by circleone.
Enhancements added as well by circleone:
- Disables the ability to change the audio track order based on columns in 3532.
- Changes the size of audio widgets from mini to small so they are easier to see.
- Add scroll bar to the subtitles tab.

git-svn-id: svn://localhost/HandBrake/trunk@3537 b64f7644-9d1e-0410-96f1-a4d463321fa5