rem: item = glade_xml_get_widget (totem->xml, "trcm_next_chapter");
add: item = glade_xml_get_widget (totem->xml_popup, "trcm_next_chapter");
context: update_buttons (Totem *totem){	GtkWidget *item;	gboolean has_item;	/* Previous */	/* FIXME Need way to detect if DVD Title is at first chapter */	if (totem_playing_dvd (totem->mrl) != FALSE)	{		has_item = TRUE;	} else {		has_item = totem_playlist_has_previous_mrl (totem->playlist);	}	item = glade_xml_get_widget (totem->xml, "tmw_previous_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "tcw_previous_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml,			"tmw_previous_chapter_menu_item");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "trcm_previous_chapter");	gtk_widget_set_sensitive (item, has_item);	/* Next */	/* FIXME Need way to detect if DVD Title has no more chapters */	if (totem_playing_dvd (totem->mrl) != FALSE)	{		has_item = TRUE;	} else {		has_item = totem_playlist_has_next_mrl (totem->playlist);	}	item = glade_xml_get_widget (totem->xml, "tmw_next_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "tcw_next_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "tmw_next_chapter_menu_item");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "trcm_next_chapter");	gtk_widget_set_sensitive (item, has_item);}