WinGui:

WinGui:
- Audio Panel fixes and Usability improvements.
- Disabled DRC control which shouldn't have been active when AC3/DTS was selected
- Greyed out text labels for Mixdown, Samplerate, bitrate and DRC to help make it clearer the controls are disabled when AC3/DTS is selected.
- Changed the values which those controls are reset to when AC3/DTS are selected so they are not showing the first value in the dropdown. (e.g 32 for the bitrate. This was a little mis-leading)
- Changed Mixdown from Automatic to "AC3 Passthru" to match the MacGui when AC3 is selected. Same for DTS

git-svn-id: svn://localhost/HandBrake/trunk@3033 b64f7644-9d1e-0410-96f1-a4d463321fa5