Improve login flow

After user logs in, until now they would be redirected to the edit profile page until their profile is complete. Now they will be redirected there only for the first time and then every 5th login until their profile is complete.
I need to clean up both helpers. The order of the configuration inside is a bit fragile. But yeah, it's covered in `rails_helper.rb` because the page objects are only used for feature tests - which require rails.