* xterm.c (x_initialize): Don't install Xt event timer here.

	* xterm.c (x_initialize): Don't install Xt event timer here.
	(x_timeout_atimer_activated_flag): New var.
	(x_activate_timeout_atimer): New function to install Xt timer.
	(x_send_scroll_bar_event, x_process_timeouts): Use it.

	* xmenu.c (x_menu_set_in_use, popup_activate_callback)
	(create_and_show_popup_menu, create_and_show_dialog): Use it.

	* xterm.h (x_activate_timeout_atimer): prototype.