Video: Added bitrate selector.

git-svn-id: svn://svn.code.sf.net/p/subsonic/code@4081 104adb81-38d2-4886-885e-82898e39ce25
Use <optgroup> in playQueue.jsp

git-svn-id: svn://svn.code.sf.net/p/subsonic/code@4082 104adb81-38d2-4886-885e-82898e39ce25