- The new modal uses the Pajamas modal component
  and the reCAPTCHA Javascript API.
- The backend spam/reCAPTCHA communication flow is
  done via GraphQL.
- Also uses 'captcha' termiology in order to not
  be tightly coupled to Google's reCAPTCHA
  captcha implementation, and make it easier to
  support additional captcha implementations in
  the future.