Refactoring of tuplet-in-use detection
Fix wrong check of equal tuplet chords
Fix check of availabe tuplet voices with single voice
Add Q_ASSERT: error when there are the same chords in different tuplets
Add 2 Q_ASSERT: error when for drum track voice != 0 or tuplets have equal chords
Add 2 Q_ASSERT: error when tuplet chords are empty or tuplets with equal voices overlap