Allow mouthpiece to omit fipple factor, but ensure calculators can cope with omitted factor.
Construct a BorePoint from an explicit position and diameter.
Don't listen for table changes until after table is constructed.
Name is no longer populated by default.
Generalize support from FileDataModel to BasicDataModel.
Not necessary to update data model when loading this data view pane.
Add dialog-style GUI to display/modify instrument definitions.