Custom text in markers (coda/segno) lost on saved/load

Ubuntu Studio 14.04, GIT commit: 25addca

1) new score
2) add Coda
3) double click to edit
4) append text "Hello, world"
5) save
6) reload

Result: the text is gone

I have verified the text is actually written to the file and read from the file correctly; it's lost during setMarketType(). I have a tentative fix I will push shortly: have setMarkerType() not set the text unless empty. A side effect of this is, changing the type of the marker using Inspector won't change its appearance automatically. I will call this a feature :-), but if you disagree, I'm sure there are alternate fixes.