- simplifies redirect logic and fixes a bug in google where we were bein...

...g incorrectly redirected

- makes login.url a list, since google has two login urls
- explicitly hides the waltz icon when on a two factor page
- hides the waltz icon when formOnly is specified in config and not on a login page

Fixes https://github.com/waltzio/waltz/issues/89 and https://github.com/waltzio/waltz/issues/90