fix some crash with invalid drumset
merge README into README.md
fix #22911: slur entry broken
fix mtest reference
fix #22769 : staff or system text over more lines
sensible default for tempo text
add language files manager to download translations from the web
more fixes for 1.3 slurs import
update mtest
make instruments dialog persistent
fix #22919
fix #22093: Crash when selecting fixed pitch LH/RH separation
change suggestedLateny back to 100ms on windows
fix #22928: Slur of tablature in linked stave ends on note of pitched stave
first try to use the system proxy for all network communication
fix #22978
fix #22978: crash on loading 1.3 scoresw with empty cleflist and ledger lines
fix slur insertion when range selected
fix #22992
fix typo!