MusicXML import should honor "measure-style/slash"
As per forum discussion, successfully importing MusicXML leadsheets into MuseScore includes processing the
measure-style/slash directive at import time. In its simplest form, this directive acts like the "Toggle Rhythmic Slash Notation" function in MuseScore.
The proposal here is to wire the MusicXML import routine to convert measures to rhythmic slash notation when
measure-style/slash is found.