message: add required id (and fix console log error)
diff: @@ -84,7 +84,7 @@ export const GraphLayers: React.SFC<GraphLayersProps> = props => {
  </label>
  </div>
  ));
  - const popover = <Popover>{toggleItems}</Popover>;
  + const popover = <Popover id="layers-popover">{toggleItems}</Popover>;
  return (
  <OverlayTrigger overlay={popover} placement="bottom" trigger={['click']} rootClose={true}>
  