Albums with multiple discs aren't sorted correctly
Thank you for creating this app, it's definitely my favorite music player for GNOME.
Unfortunately, it seems like albums that contain multiple discs aren't fully supported yet in G4Music 3.4.
Current behavior
Tracks from multiple discs are mixed together. They seem to be sorted by track number, then alphabetically.
Expected behavior
All tracks from disc 1 should precede all tracks from disc 2. They should be sorted first by disc number, then by track number, then alphabetically.
How to reproduce
Import an album with multiple discs to your music library. I created a fake version of the above album that includes all tags and the naming scheme I use. Just extract fakeslimshady.tar.xz into your music folder.