This is a brief UX/UI enhancement I'd like to see.
I'd like to see that where the resource "custom properties for nodes" is generated, if you click on a value that is specified you are taken to either search results for that custom property or to the part of "manage nodes" page where you are viewing the list of nodes with that assigned custom property.
Example: Clicking on any custom property would search for all nodes that match that custom property and provide that in some way. I'm sure this could be done via a smart sql JOIN (and I'll look into it), but it would be nice in general.
I would like to see this across all products, but at least NPM this would be useful.