set video initialization value in CSongMenuFramework.cs to -1. otherwise it will try to unload the wrong stream on start up.
do not load background music video if it isn't needed
restore ids when closing audio streams
fixed typo
fixed crash (if you click very fast on next song). please check if there are any memory leaks now.
Merge branch 'develop' of github.com:Vocaluxe/Vocaluxe into develop
Added new language-strings.