WooCommerce Points and Rewards 1.8.2

* Fix - Points not being redeemed when order is on-hold.

* Tweak - Add custom message setting specifically for variable products.
* Tweak - Rename My Account tab to "Points"
* Fix - Translation domain not the correct string.
* Fix - Theme switch breaks my account points endpoint.
* Fix - Do not add points for a gifted order.

* Fix - Points earned message not showing correct amount on cart/checkout in certain cases due to caching.
* Fix - Sometimes redeemed points message in cart/checkout page shows incorrect amount.
* Fix - When cart has coupon, points applied incorrectly in certain cases.
* Fix - Deprecated use of get_cart_url causing deprecating notices.