Attach event listeners and key elements to root node?

[JRJurman]

Summary

After reading https://reactjs.org/blog/2020/08/10/react-v17-rc.html, specifically where event listeners are attached, it becomes clear that a lot of issues may be caused by attaching to top level elements. We should investigate what parts of the code could instead be attached to a root element, and what changes would be required to make that work.