Melisma lines saved in 3.1 do not appear when opened in 3.0
(Priority assumes we want 3.1 scores to open correctly in 3.0 where possible)
1) enter four quarter notes
2) enter lyrics "A _ _ B"
4) open in 3.0.5
Result: melisma line is gone. That's because we saved the "ticks" values as a fraction instead of converting to integer ticks.