Set Email Access Token When Enabled Upon Successful Donation

[DevinWalker]

Scenario: A donor makes a donation with email access turned on. They see the confirmation page just fine, but when immediately navigating to "Donation History" or "Manage Subscriptions" they are prompted to enter their email and gain access.

Solution: Enable access for them upon successful donation

[DevinWalker]

Actually I think this may be a bug... The session should still be active for the donor unless they closed the browser thus making the email login screen irrelevant. We should be checking for active session prior to outputting the email access login view.