Fix #7972: show invalid orders to stations that don't accept your vehicle (#8516)

Before it was shown as a normal order, but the vehicle was skipping
it. This was rather unclear to the user. Now it is red and contains
text with some hints what is going on.

The text is prefixed rather than post-fixed, as we have many
post-fixes already.

src/lang/english.txt

@@ -4021,6 +4021,7 @@ STR_ORDER_REFIT_STOP_ORDER                                      :(Refit to {STRI
 STR_ORDER_STOP_ORDER                                            :(Stop)
 
 STR_ORDER_GO_TO_STATION                                         :{STRING} {STATION} {STRING1}
+STR_ORDER_GO_TO_STATION_CAN_T_USE_STATION                       :{PUSH_COLOUR}{RED}(Can't use station){POP_COLOUR} {STRING} {STATION} {STRING1}
 
 STR_ORDER_IMPLICIT                                              :(Implicit)
 

src/order_gui.cpp

@@ -28,6 +28,7 @@
 #include "hotkeys.h"
 #include "aircraft.h"
 #include "engine_func.h"
+#include "vehicle_func.h"
 
 #include "widgets/order_widget.h"
 
@@ -258,8 +259,9 @@ void DrawOrderString(const Vehicle *v, const Order *order, int order_index, int
 		case OT_GOTO_STATION: {
 			OrderLoadFlags load = order->GetLoadType();
 			OrderUnloadFlags unload = order->GetUnloadType();
+			bool valid_station = CanVehicleUseStation(v, Station::Get(order->GetDestination()));
 
-			SetDParam(0, STR_ORDER_GO_TO_STATION);
+			SetDParam(0, valid_station ? STR_ORDER_GO_TO_STATION : STR_ORDER_GO_TO_STATION_CAN_T_USE_STATION);
 			SetDParam(1, STR_ORDER_GO_TO + (v->IsGroundVehicle() ? order->GetNonStopType() : 0));
 			SetDParam(2, order->GetDestination());