Fractional beam on small staff too long
Steps to reproduce:
1. Create a score with two staves.
2. Make one staff small.
3. Enter notes with fractional beams.
Fractional beams on the small staff should be the length of a notehead.
They are the same length as on the normal staff, i.e. not scaled down.
OS: Windows 8 (6.2), Arch.: x86_64, MuseScore version (64-bit): 22.214.171.1248021803, revision: 3224f34