WooCommerce Points and Rewards 1.8.0

* 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.

* Fix - Flush endpoints to prevent 404 on Points and Rewards tab in My Account.

* Fix - Admin can't update customer points on a multisite install.
* Fix - Show all available users in the points table for admin.
* Tweak - Move Points and Rewards to My Account Tab on the frontend.