Bug 208804 [CommonNavigator] change "Navigator" view perspective links
bundles/org.eclipse.ui.ide.application/src/org/eclipse/ui/internal/ide/application/ResourcePerspective.java
private static String ID_PROJECT_EXPLORER = "org.eclipse.ui.navigator.ProjectExplorer"; 
    /**
     * Constructs a new Default layout engine.
     */
    public ResourcePerspective() {
        super();
    }
    /**
     * Defines the initial layout for a perspective.  
     *
     * Implementors of this method may add additional views to a
     * perspective.  The perspective already contains an editor folder