mainwindow: implement _refreshUIFromConfig
profilecontainer: no more micromanagement of activeprofile
(fake) uiProfile: don't complain if activeprofile is passed
soundcontainer's loadConfig wipes out itself

soundcontainer: before loading sounds do a wipe out
drop the stupid dict_ prefix
soundcontainer: s/fileOfSound/fileOfSoundHandler/ for correctness
fix name/handler mixup and fix loading (fixes: #17)