Product Catalog - Product Sharing Improvements

[sHruschka]

In a shared Product Catalog I am missing the following options:

1. we would need the possiblity to see which product is shared with which Entity

2. It should be possible to share all products at one step without clicking through all the products

3. It should be posible to share the products with all Subentities in one step, not only with one subentity (and repeating this for every entity)