radio.go
func (c *Radio) SetSelected(val bool) {
	c.selected = val

	if c.onChange != nil {
		go c.onChange(val)
	}
}
func (c *Radio) SetSelected(val bool) {
	c.selected = val

	if c.onChange != nil {
		go c.onChange(val)
	}
}
// SetSelected makes the button selected. One should not use
// the method directly, it is for RadioGroup control