changing dotted note length, the dots stay behind

Create a triplet. Middle note is a double dotted sixteenth, followed by a 64th. click on the double dot sixteenth, type 4 to switch to eighth note. expected: eighth note Result: double dotted eighth note.

pretty sure it doesn't actually affect beatcount, and the dots are deletable. But it is a bug.

MuseScoreNightly-2016-08-08-2132-master-d39279b.7z, windows 8.1