Tested and confirmed. It's interesting that you can add/remove it from the wishlist there.

Might be intentional though (not having to check if something is on your wishlist probably makes it a lot faster).

Are you sure about this one? It definitely shows the wishlist borders for me.

I think what I am seeing is a caching issue. If I go to my inventory, put something on the wishlist, then try to preview it here it doesn't show the outline.. but if I try to preview with an item that has been on my wishlist for awhile it works.

I wonder if this is what happened to ?