dvdplayer: fix incorrectly indicated buffered samples after ae7cda6629c7180430a25d834ea83ab5d9f47d77
dvdplayer: only set audio and subtitle indax on user action
guiinfo: fix abuse of settings for current audio and subtitle streams
applicationplayer: cache audio and subtitle index
Merge pull request #4921 from FernetMenta/audiostream

dvdplayer: only set audio and subtitle index on user action
Merge pull request #4901 from FernetMenta/truehd

dvdplayer: fix incorrectly indicated buffered samples after ae7cda6629c7...