[1.1] Changing font properties for dynamic causes "p" to disappear, undo leads to crash
Steps to reproduce:
1. Create sample score and place some notes
2. Place piano (p) from dynamic palette
3. Right click on dynamic, choose text properties and change font size for something else
Expected behaviour: the size of piano (dynamic) sign should change
Actual behaviour: the piano dynamic sign dissapears.
Try to undo with Ctrl+Z -> crash.
This happens only with "p" dynamic sign. All the others dynamics changes font size without problem.