fix QComboBox items' capitalization in Inspector
fix toolTips to use Sentence case
fix #36461: Export port information to MIDI files
fix #8924: native support for slash notation
extend StaffType for alternative notations. create StaffTypeTemplate class for customizable, saveable StaffTypes.  create StaffTypeTemplates Dialog.
provide proper note drag behavior for alternative notemapping.  fix bug with accidentals.
add basic preview box to StafftypeTemplates Dialog