Woocommerce Name your price 3.5.14

* Update: Change updated against plugin headers.

* Update: Tested against WooCommerce 5.0.
* Fix: Incorrect quantity on product page when editing a price in cart.
* Tweak: Serve minified stylesheets when SCRIPT_DEBUG constant is false.
* Tweak: Remove use of deprecated jQuery select(), focus(), and change() shortcuts.
* Tweak: Use fallback selector when theme's don't use .single_add_to_cart_button class on add to cart buttons on single product page.

* Update: Tested against WooCommerce 4.7.
* Tweak: Remove use of jQuery ready().
* Tweak: Change click handler to use a class property, for more extensibility.