add command: resequence rehearsal marks
add mtests
fix #41036: no beam over gap
fix #24084: mixer pan not exported to MusicXML
fix #38976
Merge pull request #1525 from MarcSabatella/resequence-rehearsal-marks

Resequence rehearsal marks
translate accidental names in accessibleInfo
make preview an option in ScoreBrowser
change synthesizer volume defaults
fix #41326: correct transposition of MIDI input
Merge pull request #1531 from lvinken/musicxml-fixes

fix #38976
Merge pull request #1529 from Jojo-Schmitz/pan

fix #24084: mixer pan not exported to MusicXML
change ExportMusicXml::keysig parameters to enable writing custom keysigs
#33546: initial support for MusicXML export of non-standard key signatures
Fix voice separation for tracks after already separated one
fix #32231: width of initial measure & other measures with key signatures in continuous view
#33546: basic support for import and export
Less sensitive chord quantization for non-human files
Don't read tempo track of human-performed MIDI files
#33546: fix formatting and order