This list is pretty awesome:

<img width="390" alt="Screenshot 2020-04-03 at 00 12 08" src="https://user-images.githubusercontent.com/810438/78308234-e0047780-753f-11ea-9d4f-1e2d31e5baa0.png">

But always struggle to guess which component in the owner list I need to jump to.

We should make hovering the owner list highlight components, just like the main tree view does.

@hristo-kanchev, interested?
dispatch({
        type: 'RESET',
        externalValue,
      });
    } else {
      dispatch({
        type: 'UPDATE',
        editableValue: state.editableValue,
        externalValue,
      });
    }
  }
  return [state, dispatch];
}
export function useIsOverflowing(
  containerRef: {current: HTMLDivElement | null, ...},
  totalChildWidth: number,
): boolean {
  const [isOverflowing, setIsOverflowing] = useState<boolean>(false);
  
  useLayoutEffect(() => {
    if (containerRef.current === null) {
      return () => {};
    }
    const container = ((containerRef.current: any): HTMLDivElement);
    const handleResize = throttle(
      () => setIsOverflowing(container.clientWidth <= totalChildWidth),
      100,
    );
    handleResize();