UIInput<Boolean> is always defaulted (making requiring it as an input impossible)

If you set a UIInput<Boolean> as follows:

@WithAttributes(label = "fake", required = true, description = "just put something")

It will never require the user to enter a value. This is because the default is "false" even though no default was specified and the field is labelled as required. This should support tri-state booleans, and it should be possible to have a required boolean.