Showtime-2.99.508: Minor UI Update - 改機

改進影片播放介面：

* Add support for cycling between audio and subtitle tracks using a
single button
* Also display the current selected audio and subtitle tracks in
the video deck
* Map the relevant PS3 BD controller buttons for these actions

版本編號：2.99.508.g1526d.cassine

編譯完成的.pkg檔：http://www.multiupload.com/FPGB8AXG74

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