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
Merge pull request #497 from trig-ger/midi_fixes

fix #22093: Crash when selecting fixed pitch LH/RH separation
fix #22928: Slur of tablature in linked stave ends on note of pitched stave