WooCommerce Gravity Forms Product Add-Ons 3.5.4

* Fix: Call get price in edit mode so price adjustments are not filtered and hardcoded on the cart item price.

* Fix: Fix issue where fields with empty labels were not being saved to the order on WC 3.x
* Fix: Additional checks in display helper in case function called incorrectly from the theme or other extensions.
* Fix: Fix recording the gravity forms history on order placement, resolves warnings regarding undefined index.

* Fix: Fix issue where fields hidden by conditional logic were showing up in the order details on a completed order.
* Fix: Fix issue where entries where not created when the order was placed for Variable Products. #39
* Update: Allow the recaptcha field to function.
There is a limitation though that on successful addition to the cart the product page needs to be refreshed in order for the re-captcha to show up again.
* Fix: Fix issue where Before and After text was duplicated for Variable Products.
* Fix: Fix issue with missing argument in add_to_cart text filter.