message: Fix null errorMetrics in CardSpakline
diff: @@ -18,19 +18,16 @@ type Props = {
  class OverviewCardSparkline extends React.Component<Props, {}> {
  render() {
  - if (
  - this.props.metrics &&
  - this.props.metrics.length > 0 &&
  - this.props.errorMetrics &&
  - this.props.errorMetrics.length > 0
  - ) {
  + if (this.props.metrics && this.props.metrics.length > 0) {
  let series: VCLine<RichDataPoint>[] = [];
  const data = toVCLine(this.props.metrics[0].datapoints, 'Total', PFColors.Blue400);
  series.push(data);
  + if (this.props.errorMetrics && this.props.errorMetrics.length > 0) {
  const dataErrors = toVCLine(this.props.errorMetrics[0].datapoints, '4xx+5xx', PFColors.Danger);
  series.push(dataErrors);
  + }
  return (
  <>
  