Feature Request: Display Attached Resources on the roles page

[Thunderbottom]

Currently, deleting a role does not work or show errors in case any resources (Targets, Users) are attached to it. And there's no way to look at what resources have the role attached to it. So as a feature request, would it be possible to:

• Display Targets and Users attached to the role, in separate sections on the role page.
• Disallow deleting a role if there's any resource attached to it.