improve compatibility with 1.3 scores having midi user offtome offset
fix zoom via mag box
fix regression & mtest
add a start of unregisterPlugin function
fix accidental parenthesis in palette by using an icon, it's the same than the note one, added a shortcut to add bracket around note and accidental
add parenthesis around chord symbols via same shortcut than notes and accidentals
add missing file
fix test compilation