message: [fix] JS error after delete row level tab
diff: @@ -39,6 +39,7 @@ function mapStateToProps(
  // rows and columns need more data about their child dimensions
  // doing this allows us to not pass the entire component lookup to all Components
  + if (component) {
  const componentType = component.type;
  if (componentType === ROW_TYPE || componentType === COLUMN_TYPE) {
  const { occupiedWidth, minimumWidth } = getDetailedComponentWidth({
  @@ -49,6 +50,7 @@ function mapStateToProps(
  if (componentType === ROW_TYPE) props.occupiedColumnCount = occupiedWidth;
  if (componentType === COLUMN_TYPE) props.minColumnWidth = minimumWidth;
  }
  + }
  return props;
  }
  @@ -68,7 +70,7 @@ function mapDispatchToProps(dispatch) {
  class DashboardComponent extends React.PureComponent {
  render() {
  const { component } = this.props;
  - const Component = ComponentLookup[component.type];
  + const Component = component ? ComponentLookup[component.type] : null;
  return Component ? <Component {...this.props} /> : null;
  }
  }
  