WooCommerce Gravity Forms Product Add-ons 3.6.9

* Update - WC and WP Compatibility Updates.
* Fix - Correct incorrect translation domain.
* Fix - Be defensive in getting gravity forms history from very old orders.

* Update: Update the display for checkbox type fields (regular and product options) to display better in checkout blocks.

* Fix: Fix issue with the mutation observer causing an infinate loop on some sites where gform is not available.
* Fix: Only enqueue the admin scripts on a Gravity Forms admin page.
* WC and WP Compatibility Tags.

* WC Compatibility Tags.
* Fix: Fix issue with the grand total not properly applying to the cart item.

WC and WP Compatibility Tags.