I just found myself exporting some data from OSM and importing it to QMS just to see that overpass turbo handed me 384 tracks.
It would be nice, if QMS would not request me to sort the tracks manually but be so kind and do that (at least partially) automatically.
However I have no better idea for implementation than always looking for the closest end of another track and then merge those two. Problem is, that this would be really slow, as it has a cost of (n^2-n)/2. But still faster than doing it by hand