Add 'Referenced In' Property

When you try and delete an item from the Code Panel that's been referenced somewhere else you get a popup like the one below informing you of where it has been used so you can clean-up things. This seems to be the only place where this info is listed but it'd be nice to have it under the General or Advanced tab so if I do need it I don't have to pretend I'm about to delete it and risk fat-fingering something and actually deleting it on accident.