Managing Users/Groups - Users example needs to be same as group

https://docs-staging.couchbase.com/server/7.0/manage/manage-security/manage-users-and-roles.html

Have a different header for adding users/groups to role. Right now for users, it points to "add group" for roles, and that is confusing.
Local and external users can be combined together for symmetry.

Right now it is very confusing.