Show a "cancel" link instead of "and use another email" in wait for verification screen for required email.

* Send whether the flow is a required email flow to the confirm_email screen.
* Removing email being confirmed state from actions.js and move this to state.js
* Add some tests for both states and actions that were missing.
* Instead of a "use another email" link, there is a "cancel" link which closes the dialog.

close #987