Cannot undo Slur/Tie handle movements made in edit mode
1. User starts up Musescore with the Promenade example.
2. Selects and drags a tenuto articulation symbol from a note that starts or ends with a tie/slur.
3. Undo last operation.
Result: The tenuto returns to it's previous position but the slur does not.
Expected: Slur should be at the previous position.
OS - Debian Jessie