IDisplayName Annotation

The annotation system should supply a IDisplayNameAnnotation annotation, which the DisplayAttribute should inherit from. This should be a fallback with additional logic if a DisplayAttribute is not present. For example, the DialogStep user input request has a name property which is [Browsable(false)], but a workaround ensures that this property value is displayed as the title of the user input. The IDisplayNameAnnotation should instead reveal the title text.

@romadsen-ks & @asger - as we discussed.