b:7 chord in predefined-guitar-fretboards.ly

[Federico Bruni]

I think that a user would expect to see the most commonly used chords, i.e.
the chords in first position (without barré).
Shouldn't the b:7 be written explicitly instead of deriving it from the
bes:7 shape?

\version "2.17.97"

\storePredefinedDiagram #default-fret-table
                        \chordmode { b:7 }
                        #guitar-tuning
                        #"x;2-2;1-1;2-3;o;2-4;"

myChords = \chordmode {
  b:7
}

<<
  \new ChordNames { \myChords }
  \new FretBoards { \myChords }
>>