* plug-ins/gfig/gfig-dialog.c
	* plug-ins/gfig/gfig-preview.[ch}
	* plug-ins/gfig/gfig.h: Made Cancel work properly.  Moved "show grid",
	"snap to grid", and "show image" checkbuttons back onto main
	interface.  Eliminated GtkPreview and removed undef of
	GTK_DISABLE_DEPRECATED from gfig-preview.c.  Removed some
	unused code.