Command repeating by using cmd queues

This replaces the old pushq/saveq arrays (which were used to save
the keys pressed by the user for repeating a previous command)
with a new command queue.  This means there's no hard-coded limit
to the saved keys, and it can repeat extended commands which are
not bound to any key.

win/Qt/qt_map.cpp

@@ -530,7 +530,7 @@ void NetHackQtMapViewport::Display(bool block)
     change.clear();
 
     if (block) {
-	yn_function("Press a key when done viewing", NULL, '\0');
+	yn_function("Press a key when done viewing", NULL, '\0', TRUE);
     }
 }