When adding ComboBox property editors for selecting an Enum value for a property, the actual value of the enum must be used.  So you would set the "scope" for the class Type, and then the Values are the actual names of the enums.  This doesn't always make sense because the Developer enum names are sometimes not very display friendly (due to naming policies etc).

When using Qt Quick Control's ComboBox it is possible to do something like the following instead:

model: [
    { value: SceneEnvironment.NoAA, text: "No Antialiasing"},
    { value: SceneEnvironment.SSAA, text: "Supersample AA"},
    { value: SceneEnvironment.MSAA, text: "Multisample AA"},
    { value: SceneEnvironment.ProgressiveAA, text: "Progressive AA"}
]
 

Which means that what is shown to the user is more descriptive (and potentially translatable), but we still can use the underlaying value when getting/setting the property. 

The DS HelperWidget ComboBox should also have such a Display/Text role, as this will help improve user experience for Enum values in the property view.