rem: gnibbles_properties_destroy (properties); properties = gnibbles_properties_copy (t_properties);
add: if (pagenum == -1) { gnibbles_properties_destroy (properties); properties = gnibbles_properties_copy (t_properties);
context: static void apply_cb (GtkWidget *widget, gpointer data){	gnibbles_properties_destroy (properties);	properties = gnibbles_properties_copy (t_properties);	gnibbles_properties_save (properties);}