message: Remove extraneous true
diff: @@ -131,7 +131,6 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
  }
  private doStickyHeaders(list: HTMLDivElement) {
  - this.isDoingStickyHeaders = true;
  const rlRect = list.getBoundingClientRect();
  const bottom = rlRect.bottom;
  const top = rlRect.top;
  