Fix 85a49a0d3: hotkeys were enabled outside of GM_NORMAL (#8534)

src/rail_gui.cpp

@@ -769,6 +769,7 @@ struct BuildRailToolbarWindow : Window {
  */
 static EventState RailToolbarGlobalHotkeys(int hotkey)
 {
+	if (_game_mode != GM_NORMAL) return ES_NOT_HANDLED;
 	extern RailType _last_built_railtype;
 	Window *w = ShowBuildRailToolbar(_last_built_railtype);
 	if (w == nullptr) return ES_NOT_HANDLED;