Separate instrument parameters to categories in the instrument editor.
Add title support to NumberSlider.
Add a variation of NumberSlider for instrument number editing.
Add force variation accessors to the instrument model.
Add support for custom reserved space for NumberSlider value display.
Add instrument force variation control.
Add default force accessors to the instrument model.
Add instrument default force slider.
Reduce clutter.
Specify proper default instrument force release envelope.
Add force release envelope accessors to the instrument model.
Fix envelope widget with envelopes that do not support loops.
Use default loop markers for force envelopes that do not specify them.
Fix example instrument force settings.
Remove excess empty space inside force envelope.
Add header to force envelope.
Add force release envelope widget.
Add title to instrument name editor.
Prevent addition of new first/last nodes if a respective envelope node lock is active.
Move common code from force and force release envelopes to a shared TimeEnvelope class.