Grouping tile used to organize radio_button tiles into a row with a border around it.
Supported Platforms: Windows only
: boxed_radio_row { alignment children_alignment children_fixed_height children_fixed_width fixed_height fixed_width height label width }
A boxed radio row has a border around it. You treat the label the same way that you would treat the label of a boxed row.
Appears as a title. If the label is absent, blank (the default), or null (""), only the box appears. Spacing between a blank and a null label might be different.
Specifies the key of the currently selected radio button (the one whose value is "1").