Reuse signup redirect for reset password redirect

[ldko]

This just changes the URL a user gets redirected to when submitting a successful change password form to use the same setting that is used when a new user sets their password for the first time. For our Edit site, which uses the invite app, it has been going to the login form of the invite app, but since we use it for Edit users to generally reset their password, we want to be able to configure it to go to the Edit site login view instead.

ping @clarktr1 @somexpert @htarver this is ready for review

[somexpert]

Looks good to me and behaves as described. I have just one small comment: should we add that setting to the test settings, in case you want to test password resets locally? You'd also need emailing set up, which is a pain and not what I'd expect, so I'm alright either way. 👍

[ldko]

I opted not to add it as a test setting because out of context of the Edit project, which this app here in this repo is, I didn't know what I would set it to, where locally I set it to the full URL Edit app login.

[clarktr1]

👍