[Trunk] Copying all bar elements and pasting also pastes courtesy clef

1. Open score .
2. Click first bar (selecting notes and clef).
3. Copy.
4. Select next bar.
5. Paste.

Expected result: Notes paste without courtesy clef.
Result: Notes paste with courtesy clef.

Using MuseScore 2.0 Nightly Build (4575) - Mac 10.6.8.