[Trunk] Changing time signature offsets rests

1. Create score.
2. Enable 'Note Entry'.
3. Fill bars with notes.
4. Disable 'Note Entry'.
5. Drag 3/4 time signature onto first bar.
6. 'Yes' to "Rewrite measures until next time signature?".

Result: Rests appear offset.

Using MuseScore 2.0 Nightly Build (4959) - Mac 10.6.8.