PW WooCommerce Gift Cards Pro 3.1

- When the background image option is enabled, fixed an issue where the image could appear behind the background color.

- Fixed issue with gift card background color in the email when viewing with Outlook.

- Fixed an issue with Cumulative Bonus Gift Cards where the customer might not receive a bonus for lower valued bonuses after receiving the top bonus. Show a zero balance on the Check Balance page even when there is no activity. This is for cards that were created in the admin with an initial balance of zero.