Adding piano moves other akkolade brackets
Steps to reproduce bug
1. Create new score from "Chamber Orchestra.mscx" template (notice that the akkolade brackets are touching the straight brackets)
2. Create > Instruments
3. Add piano
4. Press "OK"
Expected behavior: Akkolade brackets should still be touching the straight brackets
Actual behavior: Akkolade brackets have shifted away from the straight brackets, leaving a gap. Double clicking on an akkolade bracket and pressing Shift+Right has no effect.
MuseScore version: r.2885 nightly
(Operating System: Windows 7)