Editor: make the CS "play" media data (mp3,dds,tga...)

Please make the OpenMW-CS start the file-type-associated program when the ID field in an asset-type-subview is clicked twice. start okular in case of dds and tga files (or whatever is set up as standard viewer) and start mplayer in case of mp3 and wav files (or whatever is set up as standard player for mp3 files)

Bethesdas-CS plays "Voice entries". Howto: open "dialouge" > choose "voice"-tab, click on one of the responses there -> the mp3/wav file will be played.

Extension: Open editor instead of player/viewer by shift-double-click (if it's possible to distinguish between player and editor) meshes: nifscope / blender images: gimp audio: audacity video: kino

(RM-2596 from redmine: created on 2015-05-31 by Who Knows, )