Fix new account setup.

We were getting a 404 because the user info doesn't exist, and were erroring
because of it, which was not calling the then (just the catch).

We now handle the error condition.

src/LoginGate.tsx

@@ -29,6 +29,8 @@ function EncryptionPart(props: { credentials: CredentialsType }) {
     // FIXME: verify the error is a 404
     store.dispatch<any>(fetchUserInfo(credentials, credentials.credentials.email)).then((fetchedUserInfo: Action<EteSync.UserInfo>) => {
       setUserInfo(fetchedUserInfo.payload);
+    }).catch(() => {
+      // Do nothing.
     }).finally(() => {
       setFetched(true);
     });

src/SyncGate.tsx

@@ -146,7 +146,7 @@ class SyncGate extends React.PureComponent<PropsTypeInner> {
       syncAll();
     } else {
       const fetching = store.dispatch(fetchUserInfo(this.props.etesync, me)) as any;
-      fetching.then(sync);
+      fetching.then(sync).catch(() => sync());
     }
   }