* in MediaPlayer, 10 most recent media specs from external apps are cached in memory, auto removed when expired
* improved Stream composer in PlayerDetailed
* ensure to properly clear media cache
* db related task in getNextMedia is moved to IO dispatcher
* tweaked user agent string, and set headers in http/cronet engines for media3
* in Session view of Log screen, click on a log copies it to clipboard
* PodciniLib upped to 1.1.5, external apps (if used) need to be updated for compatibility
