[ #20951 ] Port filters and sorting to a new, cleaner model
[ #20951 ] Port filters and sorting to a new, cleaner model

savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,KDE/libringclient,KDE/libringclient,savoirfairelinux/ring-lrc,savoirfairelinux/ring-lrc,KDE/libringclient