message: Hide icon when state is unchecked to prevent
  Hide icon when state is unchecked to prevent case where background color is distinct from white, so icon can't be viewed and don't generate confusion about its state.
diff: @@ -46,7 +46,7 @@ class CheckBox extends Component {
  >
  <IconNB
  style={{
  - color: variables.checkboxTickColor,
  + color: this.props.checked === true ? variables.checkboxTickColor : 'transparent',
  fontSize: variables.CheckboxFontSize,
  lineHeight: variables.CheckboxIconSize
  }}
  