Change: Split up Window::OnTick into OnGameTick and OnRealtimeTick. Adjust timers to work with milliseconds instead of ticks.

src/station_gui.cpp

@@ -621,7 +621,7 @@ public:
 		}
 	}
 
-	virtual void OnTick()
+	virtual void OnGameTick()
 	{
 		if (_pause_mode != PM_UNPAUSED) return;
 		if (this->stations.NeedResort()) {
@@ -2312,7 +2312,7 @@ struct SelectStationWindow : Window {
 		DeleteWindowById(WC_SELECT_STATION, 0);
 	}
 
-	virtual void OnTick()
+	virtual void OnRealtimeTick(uint delta_ms)
 	{
 		if (_thd.dirty & 2) {
 			_thd.dirty &= ~2;