I've checked the doku, etc but nothing to find ...

Is it possible to sort the library by a second + third column? (e.g. pressing ctrl + header column and shift + header column)?

E.g. I want to sort all the tracks by artist, song, mix (remixer).

Pressing ctrl(shift)+header column again for the same column should reverse the order for this column.

A third sord column is great because e.g. I have a lot of tracks multiple times - same track/same mix - and I want to sort out the track with the best sound quality (classics taken from old CD's, remastered CD's, etc.) so this would help a lot.

Thanks a lot!