WooCommerce Chained Products 3.7.0

* New: WooCommerce 3.3 compatible
* Fix: Shortcode vanishing from the editor on publish/update of variable product
* Fix: Do not accept coupon for on-sale products with chained items when 'Exclude sale items' option is checked
* Fix: Notice not being displayed when chained items are out of stock and 'Manage Stock?' option is checked
* Fix: Error notice when product with chained item is removed from cart (for WooCommerce 3.2+)
* Update: POT file

* New: WooCommerce 3.2 compatible
* Fix: Too many redirect issue on multi-site setup
* Fix: Fatal error when pulling products having chained item using REST API
* Fix: Show notice on product page when chained item is out of stock
* Fix: Select2 search issue with variable product
* Fix: Incorrect order total when creating order from back-end
* Fix: Old chained item not getting removed while switching susbcription

* Fix: Allow adding chained products to cart if backordering is allowed
* Fix: Price not set to zero for chained variable product while manually creating order from backend
* Update: POT file