Popup help for new users (via challenge link) is in place

As originally described here, popup help for new users who accepted a challenge via a link is now in place.

It looks something like this, when they arrive:

They get a series of those popups to take them through what to click to achieve changing their password.

Hopefully it’s clear that they can dismiss this sort of thing altogether (“Dont show me these”) and just for this case “Skip”).

Currently it’s only there for normal go - putting in similar for Rengo (advising them when their game will start) is on the list.

These can be controlled (reset etc) from Settings.

If you think there are other situations where we could do with a flow of popups to help people let me know.