Resend email verification email on error

[JElgar]

If a user goes to user/email-verify/{token} (by clicking a link in the email),

if there is an error (eg invalid or expired token) we should allow the user to try again.

The user may have to reenter their email but the ideal flow would be we can auto-fill this with a cached email.

The flow would therefore be:

1. User logs in and their email is stored in local storage
2. User goes to user/email-verify/token but there is an error when the graphql query is made
3. The user should be presented with an email input box which should be auto-filled with their saved email
4. The user should be able to able to update this email and click a button to resend the activatiodn email
5. This should send a request to resend the activation email using resendActivationEmail mutation