Undo Change Instrument doesn't show name of previous instrument
1. Create harpsichord score.
2. Right-click stave.
3. 'Stave Properties'.
4. 'Change Instrument'.
5. Choose piano.
Expected result: Harpsichord appears at the side.
Actual result: Piano still appears at the side.
Discussion: After step 7 - if you enable 'Note Entry' and enter a note, harpsichord appears at the side and sounds as such.
Using MuseScore 2.0 Nightly Build (4947) - Mac 10.6.8.