Interaction between WooCommerce create new copy of Product, and Publicize/Social

#### Steps to reproduce the issue

- Install/Enable WooCommerce.
- Create a product, publish.
- Edit Product, select "Create new copy".
- See the Publicize/Social settings, and publish to see what actually happens (e.g. on Twitter).

#### What I expected

The Publicize/Social settings should be editable, and default to ticked.

#### What happened instead

The Publicize/Social settings are greyed out, and default to off.

However, when the copied product is published the publicize DOES happen (e.g. posts to Twitter etc). This the settings are greyed out, this cannot be adjusted at will. So it becomes a problem.

Start by reproducing the WooCommerce product-copy flow described in the issue, then inspect the integration between product duplication and the Publicize/Social settings. Done means the copied product's settings are editable, default to enabled, and publishing follows the selected setting rather than sending an unavoidable social post.

Written by the indexing model from the issue text.