I'd love to be able to sort my music in the "All music" section in order to determine which tracks are not in any crate, and also list which crates they are in.

ie. if I drag new music into my browser, I would like to be sure each one gets into it's appropriate crates and doesn't get missed when I drop my crates on a USB stick.

I know I can sort by date added, but that doesn't help me know which tracks of the 3,000 in my library are in crates yet.