enum_ex1: coordinate two enum properties with mutually exclusive values
enum_ex1b: coordinate two enum properties with mutually exclusive values (get/set)
enum_ex2: control the number of custom-list-items to display
enum_ex3: sync enum property with user list
enum_ex3b: sync enum property with user-list. Object Rotations Demo
enum_ex3b_setup: generate the objects required for "enum_ex3b"
Pan Thistle, 2023