fix the remaining (pre-)translation issues

in the hope to have caught them all now
Merge pull request #1161 from Jojo-Schmitz/translation

more (pre-)translation fixes
save modified demo score as a new score
initial work for packaging on Windows
fix #30066: Fret mark pastes on highest string
fix #30086: 'Hide instrument name if there is only 1 instrument' broken
Fixes to Guitar Pro 4 and 5 implementations.
simplify MuseScore connect
Merge pull request #1176 from jpirie/guitar-pro-import

Fixes to Guitar Pro 4 and 5 implementations.
fix #30106: note input cursor too close too barline
fix #30116: crash on crazy short tremolo
Merge pull request #1180 from MarcSabatella/30116

fix #30116: crash on crazy short tremolo
Merge pull request #1178 from MarcSabatella/30106

fix #30106: note input cursor too close too barline