updated for version 7.3.234
Problem:    With GTK menu may be popping down.
Solution:   Use event time instead of GDK_CURRENT_TIME. (Hong Xu)
diff --git a/src/gui_gtk.c b/src/gui_gtk.c
index 94cebd4..50079b4 100644
--- a/src/gui_gtk.c
+++ b/src/gui_gtk.c
@@ -1391,7 +1391,7 @@
     gtk_menu_popup(GTK_MENU(menu->submenu_id),
 		   NULL, NULL,
 		   (GtkMenuPositionFunc)NULL, NULL,
-		   3U, (guint32)GDK_CURRENT_TIME);
+		   3U, gui.event_time);
 }
 
 /* Ugly global variable to pass "mouse_pos" flag from gui_make_popup() to