Are we feature-frozen at the moment?  If not, I'd like to push a
change to how we find the default key for the key signature dialog.

Basically instead of using GuessKey to guess it from notes, I take the
most common key signature currently in effect in the other segments.  If
there's none I fall back to guessKey.

The new function is AnalysisHelper::guessKeyAtTime.  I call it in
NotationView and MatrixView.

I had first tried changing guessKey itself to the Krumhansl and
Kessler approach of keyfinding, but that made no difference so I
abandoned it.

        Tom Breton (Tehom)



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