remove code duplication in InstrumentsDialog and NewWizard
update instrument handling
update mtest
add missing file
add another missing file
fix translation of fotomode context menu

and a better name for it
fix translation of error message reg. tuplet split

when changing timesig
fix typos and change from "8th" to "Eighth"

for consistency with other "Eighth"
fix typo by changing V_EIGHT to V_EIGHTH
fix translation of file related error messages