Revert "Remove line item presence validation Gift Card. We are going to start selling physical gift cards outside the realm of the online store, which will not require a line item (for the confirmation email/order history page)"
Revert "Remove line item presence validation Gift Card. We are going to start selling physical gift cards outside the realm of the online store, which will not require a line item (for the confirmation email/order history page)"

This reverts commit dd157939f9e26fbd05f829ef8e2029f6e35969a2.

reinaris/spree_gift_cards,TechFlavor/spree_store_credit_payment_method,bryanmtl/spree_store_credit_payment_method,surfdome/spree_gift_cards,reinaris/spree_gift_cards,forvalho/spree_gift_cards,surfdome/spree_gift_cards,surfdome/spree_gift_cards,bryanmtl/spree_store_credit_payment_method,TechFlavor/spree_store_credit_payment_method,TechFlavor/spree_store_credit_payment_method,madetech/spree_gift_cards,reinaris/spree_gift_cards,forvalho/spree_gift_cards,mleglise/spree_store_credit_payment_method,madetech/spree_gift_cards,bryanmtl/spree_store_credit_payment_method,madetech/spree_gift_cards,mleglise/spree_store_credit_payment_method