2.21.8 (unstable): Gtk: * IconView: Added get/set_item_orientation(). * MessageDialog: Added get_message_area(). * MenuItem: Added unset_submenu(). * PaperSize: Added get_paper_sizes(). * PrintOperation: Added run_page_setup_dialog() overloads * Style: Added copy(). (Murray Cumming)\ Documentation: * Several API reference documentation improvements. (Murray Cumming)