Refactor the gtk_print_operation_run() code and add an _async version.

Refactor the gtk_print_operation_run() code and add an _async version.

2006-04-24  Matthias Clasen  <mclasen@redhat.com>

	* gtk/gtk.symbols:
	* gtk/gtkprintoperation.c (gtk_print_operation_run_async): Refactor the
	gtk_print_operation_run() code and add an _async version.

	* gtk/gtkprintoperation-private.h:
	* gtk/gtkprintoperation-unix.c
	(_gtk_print_operation_platform_backend_run_dialog_async)
	(gtk_print_run_page_setup_dialog_async): Variants of the run functions
	which don't call gtk_dialog_run(), but only show the dialog and return,
	and handle the response in a signal handler.

	* gtk/gtkprintoperation-win32.c (gtk_print_run_page_setup_dialog_async)
	(_gtk_print_operation_platform_backend_run_dialog_async): Implement these
	by calling the sync versions.