WooCommerce WishLists 2.3.1

* Update: Include new filter: woocommerce_wishlist_posts_order : default ASC
* Update: Include new filter: woocommerce_wishlist_posts_order_by : default post_title
* Update: Don't enqueue the facebook connect graph API if Facebook is disabled.
* Update: Update Tweet Share Link for /intent/tweet API.
* Update: Include new filter, woocommerce_validate_wishlist_create, to allow developers to override Wishlist creation validation.
Useful if you would like to require first name, last name or email.
* Update: Tested to WC 3.5

* Fix: Don't instantiate a cart when editing a list from the Dashbaord.
* Fix: Fix issue where changes made in dashboard to lists were not saved properly.
* Fix: Double check for the customer-logout menu before attempting to adjust the my account menu.
* Update: Exclude lists from search so shared lists don't show up.

* Update: Store users lists in a transient for 24 hours to reduce an expensive query on each page load.
* WP and WC version updates.
* Update: Improve memory performance of wishlist price change email notifications.