Hairpin Width Saving

Hairpin width adjustments are not retained on saving and loading a score.

To reproduce:

1) Create a fresh score
2) Add a hairpin to this score
3) Adjust the hairpin width (click on the hairpin, click on the control area below the open end, drag vertically to adjust width either larger or smaller)
4) Save the score
5) Close the score
6) Reopen the score

Expected: Hairpin will retain modified width.
Actual: Hairpin reverted to default width.

This was not an issue to my knowledge with version 3.5, or at least other Musescore 3 versions.