Ctrl-TAB works when notebook has focus

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6337 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/notebook.cpp

@@ -178,6 +178,7 @@ static gint gtk_notebook_key_press_callback( GtkWidget *widget, GdkEventKey *gdk
         /* GDK reports GDK_ISO_Left_Tab for SHIFT-TAB */
         event.SetDirection( (gdk_event->keyval == GDK_Tab) );
         /* CTRL-TAB changes the (parent) window, i.e. switch notebook page */
+        event.SetWindowChange( (gdk_event->state & GDK_CONTROL_MASK) );
         event.SetCurrentFocus( win );
         if (!page->m_client->GetEventHandler()->ProcessEvent( event ))
         {