Users need to key in secret key each time they exit the form

[kennethchangOPENGOV]

On Angular, users would be able to key in multiple form's secret keys and it will be accessible for a period of time.

However, on React, users would be prompted to enter the secret key each time they enter a different form.

Ticket (non-exhaustive, just started tracking but have seen old requests for this):
https://formsg.zendesk.com/agent/tickets/17401