## Issue
Closes 627 account header doesn't refresh on sign up / log in
## Changes
Looking back at "[Header] Changes, fixes and improvements (#493)", noticed that old code was looking at `has_verified_email` instead of just checking whether an email exists. So, restored original code.
This does have a side-effect of the Logout button not showing any email address underneath it immediately after sign up (with the flow cancelled). But I vaguely recall it was that way previously. A refresh cleans it up.
Perhaps another `user/me` when leaving the Sign Up page can make everything in sync, but this PR simpler to test.
