(mac_dialog_modal_filter, Fx_popup_dialog) [MAC_OSX]:

(mac_dialog_modal_filter, Fx_popup_dialog) [MAC_OSX]:
Put special treatment for Fmessage_box, Fyes_or_no_p, and Fy_or_n_p
in #if 0 as it is not compatible with y-or-n-p-with-timeout.
(timer_check) [TARGET_API_MAC_CARBON]: Add extern.
[TARGET_API_MAC_CARBON] (mac_handle_dialog_event): Use QuitEventLoop
instead of QuitAppModalLoopForWindow.  Consolidate QuitEventLoop calls.
(pop_down_dialog) [TARGET_API_MAC_CARBON]: New function.
[TARGET_API_MAC_CARBON] (create_and_show_dialog): Use it for unwind.
Run timers during dialog popup.
(Fmenu_or_popup_active_p) [TARGET_API_MAC_CARBON]: Use popup_activated.