Undoing a mmrest in a score> 1 page causes a crash
GIT commit: 6eb58d5 / Windows10
1) Load this file (Treble clef template with added measures to complete the first page): 1page.mscz
2) Press "M" -> Undo
First result: no issue
3) Now, Ctrl + B (so, a second page is created)
4) Press "M"