matrix-react-sdk

523067e5 - Make email auth component fail better if server claims email isn't validated

Make email auth component fail better if server claims email isn't validated https://github.com/matrix-org/synapse/issues/7512 means that (at least) sometimes after clicking on the email validation link and being redirected to riot, the server will claim the email identity auth stage is still incomplete. This meant that we displayed the email identity UIA component but with an empty email address, because we don't know that in the new session. Work around this by assuming that if the email UIA component is being displayed but we don't have an email address input, the link has been clicked and we're just waiting for the poll. Also don't fire off an initial register request if we're already mid-UI-auth, because that's confusing and unnecessary. Also also remove unused requestingToken state. Fixes https://github.com/vector-im/riot-web/issues/13434