WooCommerce Measurement Price Calculator 3.23.7

* Fix - "Order Again" functionality includes measurement data in WooCommerce 3.0+
* Fix - Hardened add to cart validation to ensure pricing table breaks can't be manipulated in the browser

* Fix - Fix issue in WooCommerce 3.0+ where an incorrect calculated quantity was added to the cart for calculated inventory/customer-defined measurement products
* Fix - Ensure products created prior to v3.12 use dropdowns when input options are limited

* Feature - Add a percentage overage or cut estimate when accepting customer-defined measurements
* Feature - Optionally limit customer-defined measurements with minimum value, maximum value, or increment
* Fix - Ensure "remaining stock" checks do not fail when inventory is being calculated, but remaining inventory is less than 1 (requires WooCommerce 3.1+)
* Fix - Always persist user inputs if add-to-cart validation fails