Change to Staff Text Properties doesn't mark score dirty

Ubuntu Studio 14.04, GIT commit: 32fe6c4

1) new score
2) add staff text
3) save
4) right click staff text
5) staff text properties
6) change something
7) OK

Result: score is not marked dirty

I have noticed the same is true for Edit Drumset, reported earlier as #22040: No impending save after making changes to Edit Drumset.