quick fix of the demo score
fix #23816: fix dynamic mapping with new SMuFL
fix #23846, at least partly

Seems not all of MuseScore accidentals have SMuFL counterparts.
Maybe twoor more glyphs need to get combined to form the missing ones?
fix comment
fixing sentOffset for some accidentals

they seem to make more sense this way and macht their names better
use Stein-Zimmermann accidentals
Add rendering of capo chords, and capo setting.

For now, the capo position is a ChordName style setting. In the
future, it can be enhanced to allow capo position to be changed
within a score, using something like TempoMap or TimeSigMap.
If capo position is non-zero, the chord to be played with capo
applied is shown in brackets after the standard chord.

Signed-off-by: lasconic <lasconic@gmail.com>