2003-09-14  Cheuksan Wang  <wang@ai.mit.edu>

	*  Sort the video modes so the resolutions appear in order in the menu.
	Add "About" menu item.
	Pass the event time into gtk_menu_popup, so the first click will get a
	menu.
	Add a preference dialog for setting whether to select the refresh rate
	manually, or let multires select it automatically. The default is
	selecting refresh rate automatically.
	Do not print mode to stdout.
	Do not print a critical message if button 3 is pressed.
