It would be nice if ?:?? in the length fields (in release editor and Edit Recording page) would automatically disappear when the field gets focus (i.e. is clicked on or tabbed to) and re-appear if the field is still empty when it loses focus – like it did in Mason.

It's a bit cumbersome to have to first select the ?:?? (or press Delete/Backspace four times), and only then be able to enter the track length. Ideally, just clicking the field should allow to immediately input the length.