When Studio goes to display a property for editing, PropertyManager::CreateProperty calls CreatePropertyImpl in order to find the editor widget to display.
CreatePropertyImpl uses PropertyManager::CreatePropertyForType for creating editors of well-known types, but it also allows for the StudioProp metadata to specify a custom editor.
Unfortunately, the string name that the StudioProp provides is only compared to a hard-coded set of known custom editors.

It would be helpful to be able to register additional custom editors at runtime that Studio can recognize and make available for editing values.
Additionally, it would be helpful if CreatePropertyForType could recognize more types in a similar way without needing to tag all properties of a particular type with a custom editor.