Allow the mechanical action of radio buttons to be switch until released.
The way I make arrow buttons now is to put switch until released buttons in a cluster and watch for the value changed event of the cluster. When it changes, I convert the cluster into an boolean array, that array into a number, then feed that number to a case structure. Switch until released radio buttons, "No Selection" being a necessary default, would make that code nicer. The case selector would be an enumeration instead of a number.
