Unisons between voices should share noteheads even if durations differ
Windows 7, GIT commit: a722cfd
1) new score
2) add eighth note C in voice 1, quarter note C in voice 2
Result: separate noteheads
Expected result: they share a notehead
Algorithm should be, noteheads can be shared if they have the same group, same type, and both have stems. Should probably check for same number of dots, although it is sometimes acceptable to share noteheads even for notes with different dots. But this can left at the discretion of the user.