Show sub-classes and special classes in Inspector

@Norm How hard would it be (or even possible) to show all classes in the inspector panel when you select an element from the navigation tree? I guess some of the classes are builtin to bootstrap and must be added to the class manager to change some elements.

Sometimes I add a class to an element and I expect the class to change the element and then find out it doesn’t because there is a builtin class or sub-class that takes priority.