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/Application/RiaApplication.cpp

@@ -662,7 +662,10 @@ bool RiaApplication::loadProject( const QString& projectFileName, ProjectLoadAct
                         }
                     }
 
-                    setActiveReservoirView( riv );
+                    if ( riv->showWindow() )
+                    {
+                        setActiveReservoirView( riv );
+                    }
 
                     RimGridView* rigv = dynamic_cast<RimGridView*>( riv );
                     if ( rigv ) rigv->cellFilterCollection()->updateIconState();