Create error handler page icshwi 8786

Added an error boundary to the application. This should catch all uncaught rendering errors or errors in callbacks (except for HTTP fetch). Instead of crashing the app, a "whoops" page will be shown with a button to reload the application and the stack trace.

To implement this, I added a new dependency "react-error-boundary" and also had to pin "react-error-overlay" because there is a bug in the latest version which affected development.