Allow linking of contour map views

* Place copy of contour map in correct collection
* Allow linking of contour maps
* Improve handling of contour views and 3D views
* Guard nullptr
* Guard assert seen on Linux
* Zoom all on contour map when unlinked to reset zoom
If a contour map is linked to a 3D view, the view can get distorted. Call ZoomAll to reset to sensible defaults.

* Remove default rainbow legend

ApplicationLibCode/ProjectDataModel/RimEclipseContourMapView.h

@@ -41,6 +41,7 @@ public:
     void    updatePickPointAndRedraw();
 
     RimSurfaceInViewCollection* surfaceInViewCollection() const override;
+    void                        zoomAll() override;
 
 protected:
     void initAfterRead() override;