Grace note stem direction in multi-voice context

1. Create a measure containing voice 1 and voice 2 notes
2. Drag a grace note to a voice 2 note

Expected behavior: In a multi-voice context the grace note should match the stem direction of the voice it is associated

Actual behavior: grace note stems up even though voice 2 notes are supposed to stem down

Discussion: Grace notes/acciaccaturas/appoggiaturas should stem up by default in a single-voice context but in a multi-voice context they should match the stem direction of the voice that they are a part of.