Okay, so I understand there is already a suggestion to be able to import a lion to the wardrobe with its decor. This suggestion works alongside that OR could even work without that change implemented.

Basically, I'd like to have a toggle button "show decor from my hoard only" to enable me to preview ONLY the items I already have. I have a whole bunch of decor and I certainly can't remember them all, so instead of having to open my hoard and wardrobe at the same time in order to pretty up my lions, I would simply click the toggle button in the wardrobe, which would remove any non hoard decor from the option list.