WCM-170 Validate and clean preferences to missing references
WCM-170 eliminate duplicated code
WCM-170 removed duplicated logic and use existing methods for configuration
WCM-189 fix hiding asset selector
WCM-189 Use empty constructor
WCM-189 Rule is no longer valid if the asset is not visible (e.g. it's in the recycle bin)
WCM-189 SF - move logic