@Bo Mellberg wrote:
Probably a “virtual playlist” is the best way, with possibility to add songs and albums to it is the best. If you have other ideas, please keep them coming./Bo
Exactly how I see it. Have a virtual playlist (currently playing?) that contains all the things that are queued for playing. That is selectable from the “source” window and displays in the “songlist”. Songs are queued by selecting them from the Artist, Album or current songlist.