message: RangeSlider: add disabled example
diff: defaultValue={[12, 16]}
  />
  </FormItem>
  + <FormItem top="Disabled">
  + <RangeSlider
  + min={10}
  + max={20}
  + step={1}
  + defaultValue={[12, 16]}
  + disabled
  + />
  + </FormItem>
  </Group>
  </Panel>
  </View>
  