Show what is blocking publishing if it contains private elements

Right now, if something private was added into a project that is owned by someone other than the owner and it's blocking you from publishing, it gives you nothing to go on as to what is blocking it.

It's super frustrating. Especially as we own the thing that we want to publish. So anything that was put in there must've been put there by us, so we know about it, or put there by someone we gave permission by adding them as a collaborator. *And* it can be almost impossible to figure out what the problem item is and fix it to be able to actually publish the thing without getting Mm involved to dig through the servers and figure it out for us.

Please allow the list of private assets involved to be shown to us even if it's stuff we don't own. It would save a lot of publishing headaches for larger teams, and would save on work for Mm to do to help creators be able to publish their own work.