desktop-window: make NautilusDesktopWindow a navigation window

We still have to fix sidebar/toolbar visibility though.

src/nautilus-desktop-window.c

@@ -45,7 +45,7 @@ struct NautilusDesktopWindowDetails {
 };
 
 G_DEFINE_TYPE (NautilusDesktopWindow, nautilus_desktop_window, 
-	       NAUTILUS_TYPE_SPATIAL_WINDOW);
+	       NAUTILUS_TYPE_NAVIGATION_WINDOW);
 
 static void
 nautilus_desktop_window_init (NautilusDesktopWindow *window)

src/nautilus-desktop-window.h

@@ -47,13 +47,13 @@
 typedef struct NautilusDesktopWindowDetails NautilusDesktopWindowDetails;
 
 typedef struct {
-	NautilusSpatialWindow parent_spot;
+	NautilusNavigationWindow parent_spot;
 	NautilusDesktopWindowDetails *details;
         gboolean affect_desktop_on_next_location_change;
 } NautilusDesktopWindow;
 
 typedef struct {
-	NautilusSpatialWindowClass parent_spot;
+	NautilusNavigationWindowClass parent_spot;
 } NautilusDesktopWindowClass;
 
 GType                  nautilus_desktop_window_get_type            (void);