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/RimViewLinker.h

@@ -83,7 +83,7 @@ public:
     void scheduleGeometryRegenForDepViews( RivCellSetEnum geometryType );
     void scheduleCreateDisplayModelAndRedrawForDependentViews();
 
-    void allViews( std::vector<RimGridView*>& views ) const;
+    std::vector<RimGridView*> allViews() const;
 
     void updateUiNameAndIcon();
 
@@ -113,6 +113,7 @@ private:
     void allViewsForCameraSync( const RimGridView* source, std::vector<RimGridView*>& views ) const;
 
     void removeOverrides();
+    void updateScaleWidgetVisibility();
 
 private:
     caf::PdmChildArrayField<RimViewController*> m_viewControllers;