Take variation changes into account when editing cart product

Hi there!

When editing a customized product in the cart, variation changes aren't incorporated into the new product. This can lead to totally unexpected results if a customer decides to change an attribute, which hampers checkout and seems to force them to redesign their product from the ground up.

Example: The bounding box doesn't update to follow the new FPD customizer selected on variation change.

To replicate:

1. Add a customized product. https://packagingllama.com/shop/custom-printed-full-color-shopper-kraft/

2. In Cart, click to edit that product.

3. Select a different size to load a different customizer.

4. See the bounding box hasn't updated to the new customizer.

Thanks,

Chris