[Done v1.3.9] Linking product to another category changes master category for prod

[shrimp-gumbo-mmmhhh]

Linking a product to another category changes the master category for that product

My thought is that when you first create an item, that is the correct master category unless you MOVE that item to a different category or change the master category.... when linking a product to another category the master category should not change but should still be the original category.

Shrimp