Add gtk_status_icon_get_screen and gtk_status_icon_set_screen.

Add gtk_status_icon_get_screen and gtk_status_icon_set_screen.

2006-12-27  Tor Lillqvist  <tml@novell.com>

	* gtk/gtk.symbols: Add gtk_status_icon_get_screen and
	gtk_status_icon_set_screen.

	* gtk/gtkstatusicon.c: Implement gtk_status_icon_position_menu()
	on Windows. Keep track of where the last button click on the
	taskbar icon took place, and return that. Obviously not correct if
	no button has ever been clicked on the icon, or if the geometry of
	the taskbar has changed since. But for most use cases where a menu
	is going to be displayed as a direct result of a button click on
	the status icon, works fine. (#377349)

	Implement getting the orientation property on Windows.

	(gtk_status_icon_embedded_changed)
	(gtk_status_icon_orientation_changed): Ifdefify these functions
	that are used only on X11.