(#483) Improved how filters and filter collections are grayed out

ApplicationCode/ProjectDataModel/RimGeoMechPropertyFilterCollection.h

@@ -55,6 +55,7 @@ public:
 protected:
     // Overridden methods
     virtual void                    fieldChangedByUi(const caf::PdmFieldHandle* changedField, const QVariant& oldValue, const QVariant& newValue);
+    virtual void                    defineUiTreeOrdering(caf::PdmUiTreeOrdering& uiTreeOrdering, QString uiConfigName);
     virtual caf::PdmFieldHandle*    objectToggleField();
     virtual void                    initAfterRead();
 };