use a ref instead of id for focus management
Closes #282 (closed). Refs should be used with caution, but focus management is the main suggested application, see https://reactjs.org/docs/refs-and-the-dom.html
Closes #282 (closed). Refs should be used with caution, but focus management is the main suggested application, see https://reactjs.org/docs/refs-and-the-dom.html