message: Update sticky headers when breadcrumbs pop in or out
  Fixes
diff: @@ -111,6 +111,10 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
  const newVal = BreadcrumbsStore.instance.visible;
  if (newVal !== this.state.showBreadcrumbs) {
  this.setState({showBreadcrumbs: newVal});
  +
  + // Update the sticky headers too as the breadcrumbs will be popping in or out.
  + if (!this.listContainerRef.current) return; // ignore: no headers to sticky
  + this.handleStickyHeaders(this.listContainerRef.current);
  }
  };
  