Implement smart layout for slurs to avoid crossing notes
1) Create a new score (time signature doesn't appear to matter)
2) Add eighth notes where the middle of three notes is somewhat lower than the end notes.
3) Slur the three notes
Result: Slur crosses the middle note and must be hand edited.
4) Add another staff and create parts
Result: Slur in the newly created parts crosses the middle note and must be hand edited again.