[WIP] Fix auth infinite loop with multi-tabs

[mikkopaderes]

[roomman]

Hi @mikkopaderes, you may already have spotted this issue but I was playing about with the "cherryPicker" idea today, using the latest commit on this PR.

  public async restore(): Promise<AuthenticatedData> {
    return new Promise((resolve, reject) => {
      const auth = getAuth();

      const unsubscribe = onAuthStateChanged(
        auth,
        async (user) => {
          unsubscribe();

          if (user) {
            resolve({ user: parseCherryPickedUser(user) });
          } else {
            getRedirectResult(auth)
              .then((credential) => {
                if (credential) {
                  resolve({ user: credential.user });
                } else {
                  reject();
                }
              })
              .catch(() => {
                reject();
              });
          }
        },
        () => {
          unsubscribe();
          reject();
        }
      );
    });
  }

I opened a session and logged in fine. I then opened two additional tabs on the same route. I logged out in one and all three sessions were invalidated. Then I attempted to login again but that was immediately invalidated by the others. I tried again and all three sessions fired up.

I logged everything out and discovered that on the initial attempt, onAuthStateChanged and getRedirectResult in the second and third sessions is returning null, so the promise is rejected.

[mikkopaderes]

@roomman yeah, noticed that which is what's keeping this PR from being merged. There's some relevant info here so I'm trying to see if that would work for us.