Does not account for anon_mail field in registrations section on Order (admin/commerce/orders/%) page

When you view an order on the admin/commerce/orders/% page the registration that are displayed in the table show the email address from the order, not the email address from the registration. This is because the mail field from the wrapped entity is used without consideration for the anon_mail field from the registration entity. I am attaching a patch that accounts for this where if there is not an anon_mail value set it will default back to the regular mail field from the order. The anon_mail field is filled in when the user creating the registration is different than the registration (They selected the "Other person" option for the registration is for field).