message: adding null checks to adhoc filter popover
diff: @@ -141,8 +141,10 @@ export default class AdhocFilterEditPopoverSimpleTabContent extends React.Compon
  handleMultiComparatorInputHeightChange() {
  if (this.multiComparatorComponent) {
  - // eslint-disable-next-line no-underscore-dangle
  - const multiComparatorDOMNode = this.multiComparatorComponent._selectRef.select.control;
  + /* eslint-disable no-underscore-dangle */
  + const multiComparatorDOMNode = this.multiComparatorComponent._selectRef &&
  + this.multiComparatorComponent._selectRef.select &&
  + this.multiComparatorComponent._selectRef.select.control;
  if (multiComparatorDOMNode) {
  if (multiComparatorDOMNode.clientHeight !== this.state.multiComparatorHeight) {
  this.props.onHeightChange((
  