Cross-staff notes don't cause existing beams and stems on other stave to avoid it

See also https://musescore.org/en/node/293262 for the initial report.

1. Create a new score with a grand staff.
2. Enter notes on the top staff above the middle line, so that the stems and beams point down.
3. Add some notes to the bottom staff and move them to the top staff via Ctrl + Shift + Up.
4. Expected: notes in top staff flip their beam direction to avoid the cross-staff notes.
   
5. Actual: notes don't avoid the cross-staff notes, but collides with them.