message: fix(viz): Header scrolling for Time Table in dashboard
  * TimeTable:
  Increase the z-index so the sparkline doesn't overlap when scrolling in the dashboard
  * Time TAble:
  Remove testing label
diff: @@ -98,12 +98,13 @@ const defaultProps = {
  url: '',
  };
  +// @z-index-above-dashboard-charts + 1 = 11
  const TimeTableStyles = styled.div`
  height: ${props => props.height}px;
  overflow: auto;
  th {
  - z-index: 1; // to cover sparkline
  + z-index: 11 !important; // to cover sparkline
  }
  `;
  