"Simple" user type value is wrongly named "Basic"

While in the interface users are considered "Simple" or "Advanced", the core creates the class with "Basic" and "Advanced" as the possible options. This doesn't cause any problems, since the code only compares with "Advanced", and anything different is considered to be "Simple". Yet, using the object editor a user will see 3 values, Basic, Advanced and Simple, which is confusing.