WooCommerce Gravity Forms Product Add-Ons 3.5.4

* Fix: Fix notice in orders screen if the gravity form entry no longer exists.
* Fix: Forms attached to variable products were no longer calculating grand total when variation changed.
* Fix: Fix translation string for Select Options.

* Fix: Fixes issue where Max Length would show up twice on paragraph fields.
* Fix: Fix issue with hanging when using Multiple Shipping Addresses plugin.

* Major Update:
Gravity Form entries are now created when a customer places an order which has gravity forms data as part of it.
See the readme.txt for more details.

* Update: WC 2.7 updates for adding order item meta.
* Update: Adds some basic CSS for multifile upload button.
* Update: Don't list gravity form product name twice when added to the cart, or order placed.
* Fix: Include helper css for file uploaders on product shortcodes.