Use polygon as data source for intersection

- Use polygon as data source for intersection
- Add padlock icon
- Show padlock icon on read only polygons
- Add Fwk function appendMenuItems() to make it possible to define context menu content in a PdmObject
- Context menu "Create Polygon Intersection"
- Updates to make visualization consistent with object and object collection enabled state

ApplicationLibCode/ProjectDataModel/Polygons/RimPolygonInViewCollection.h

@@ -18,8 +18,8 @@
 
 #pragma once
 
+#include "RimCheckableObject.h"
 #include "cafPdmChildArrayField.h"
-#include "cafPdmObject.h"
 
 class RimPolygonInView;
 
@@ -27,7 +27,7 @@ class RimPolygonInView;
 ///
 ///
 //==================================================================================================
-class RimPolygonInViewCollection : public caf::PdmObject
+class RimPolygonInViewCollection : public RimCheckableObject
 {
     CAF_PDM_HEADER_INIT;
 
@@ -38,6 +38,9 @@ public:
 
     std::vector<RimPolygonInView*> polygonsInView() const;
 
+private:
+    void fieldChangedByUi( const caf::PdmFieldHandle* changedField, const QVariant& oldValue, const QVariant& newValue ) override;
+
 private:
     caf::PdmChildArrayField<RimPolygonInView*> m_polygons;
 };