Feature request: select product catalogs in ce_product_list

[sietsevandreven]

In the product list content element, it would be great to select a product catalog instead of having to select allt he products one by one (like selecting a folder for ce_gallery). For our cliënt it would be way easier to manage the products that way, because they won't have to add products in the catalog, and also add them to the list.

[hamidpeywasti]

That's good idea. I'll do it.