Refactor connection between cases and views.

Eclipse grid views and contour maps are not longer a child of the case.
The views are not separate collections (one for grid and one for contour maps)
on root level.

ApplicationLibCode/ProjectDataModel/RimEclipseContourMapViewCollection.h

@@ -37,6 +37,9 @@ public:
 
     void onChildDeleted( caf::PdmChildArrayFieldHandle* childArray, std::vector<caf::PdmObjectHandle*>& referringObjects ) override;
 
+    void clearWithoutDelete();
+    void removeChild( RimEclipseContourMapView* contourMap );
+
 private:
     caf::PdmChildArrayField<RimEclipseContourMapView*> m_contourMapViews;
 };