More clarity on what textures/labels are being used in a scene

[sethcshort]

I'm working in a scene where I had a bunch of models that I deleted, leaving only a few models, and their attached materials.

However, when I go to save a package, it's telling me there are missing textures/labels for the objects and materials that I deleted. These links shouldn't be in the scene any longer.

I'd like some way of knowing what textures/labels are being used in the scene, and a way to manage these (re-linking, auto-discovery) outside of "create package, error, cancel, find material, relink texture, create package, error, cancel etc etc."

Thanks.