[trunk] Transpose does not change first key signature
Transposing a score changes only the notes, and leaves the key signature untouched.
Steps to reproduce:
1. Create a new score or open an existing score (for example, the default Promenade)
2. Select Notes -> Transpose from the menu, and agree to transpose the whole score.
3. Keep the defaults selected (Transpose by Key, Closest, Transpose key signatures, transpose chord names, use double sharps and flats)
4. Select a key that is different from the currently used key signature for the score, and press OK.
The notes are transposed according to the interval indicated by the new key, and the key signature is changed accordingly.
The notes are transposed, but the key signature is unchanged.
This can also be observed when using the Concert Pitch button.
Tested with r3666 (self-built) on Ubuntu 10.10