now adding albums from AllAlbumsProxyModel is fast
when adding tracks from the proxy models, use a working thread and
signals
this means that the main thread and the interface is no longer blocked
adds new methods to MediaPlayList to add list of albums or list of
tracks or list of artists
adding a lot of tracks or artists is still very slow and blocks the
interface
include QtConcurrentRun instead of QtConcurrent (suggested by ebn.kde.org)
enqueue a lot of tracks is now much faster