F2 transpose does not respect key signatures
Ubuntu 14.04, GIT commit: 7a68c4a
1) new score, C major
2) enter C major scale
3) press F2 repeatedly
Result: First two look good - transposes to C# major and D major. But then the third transposition - to Eb - spells everything with sharps. That's how the "Up" arrow works, but that doesn't transpose key signatures. When transposing key signatures, we should be spelling pitches accordingly.