Include gtkstatusicon.c on all platforms.

Include gtkstatusicon.c on all platforms.

2005-11-03  Tor Lillqvist  <tml@novell.com>

	* gtk/Makefile.am: Include gtkstatusicon.c on all platforms.

	* gtk/gtkstatusicon.c: Implement for Win32. Use code from
	gtktrayicon-win32.c as applicable. (gtktrayicon-win32.c is not
	necessary and can be removed from CVS. It has never been mentioned
	in gtk/Makefile.am.) No tray icon widget, GtkImage or GtkTooltips
	are used on Win32. One label widget is used (but never shown) as
	gtk_widget_render_icon() needs a widget.

	Ifdefs used as necessary in several places. It might be cleaner to
	split out the backend-specific parts to separate files, or at
	least collect them into separate blocks in the file.

	(wndproc): New function. Window procedure to monitor mouse events
	in the system tray icon. Call gtk_status_icon_button_press() as
	needed.
	(create_tray_observer): New function. Creates a hidden window that
	only serves as a tray icon message observer.