If a QGroupBox is disabled, then you cannot set any of its items to be enabled without first enabling it. Enabling/disabling it will set that value (true/false) on all of its items, although setting the QGroupBox to an enabled state which it already has does not result in this behaviour. Fix wxQt to match the expected wxRadioBox behaviour and allow the unit test to pass. Closes https://github.com/wxWidgets/wxWidgets/pull/1064