PW WooCommerce Gift Cards Pro 3.1

- When multiple email addresses are used to purchase a gift card, ensure that the Email Gift Card button in the admin selects the correct email address rather than showing the entire list. Confirmed compatibility with WordPress 5.7 and WooCommerce 5.1

- Changed the compatibility fix for the Variation Swatches For WooCommerce plugin by Emran Ahmed to be opt-in instead of enabled by default. Define the PWGC_WVS_ALLOW constant and set it to false to disable swatches for the gift card product.

- Do not send the gift card email if the scheduled gift card order has been cancelled or refunded.