Notation editor widgets

AgsNotationEdit — edit notes
ags_notation_edit_callbacks
AgsSelectNoteDialog — select tool
ags_select_note_dialog_callbacks
AgsMoveNoteDialog — move tool
ags_move_note_dialog_callbacks
AgsCropNoteDialog — crop tool
ags_crop_note_dialog_callbacks
AgsPositionNotationCursorDialog — position tool
ags_position_notation_cursor_dialog_callbacks

Widgets related to notation editor.