If user clicks on a Register link, WCB will open with registration frame activated. Here user can fill out his data and press the Register button or press the Cancel button (which leads to the journal front page.

If he provides correct information and click Register, a new user will be created and automatically logged in. Current page will be updated. Then, WCB will be closed. In case of incorrect information, error message will be displayed.

---

Anton: works as described and partly unit testable (#543, #544)