fix #24788: suppress 'normal' in channel name
fix #24789: copy & paste instrument change
make sure 'normal' is translated in articulation properties
add tests
Merge pull request #712 from MarcSabatella/24788-mixer-normal

fix #24788: suppress 'normal' in channel name
Merge pull request #713 from MarcSabatella/copy-instrument-change

fix #24789 - copy & paste instrument change does not copy instrument details
fix #24572