Add ctrl-click scroll to for non-destination orders

Conditional orders on station cargo and show as via orders

src/order_base.h

@@ -597,6 +597,7 @@ public:
 	bool CanLeaveWithCargo(bool has_cargo, CargoID cargo) const;
 
 	TileIndex GetLocation(const Vehicle *v, bool airport = false) const;
+	TileIndex GetAuxiliaryLocation(bool secondary = false) const;
 
 	/** Checks if travel_time and wait_time apply to this order and if they are timetabled. */
 	inline bool IsCompletelyTimetabled() const

src/order_cmd.cpp

@@ -956,6 +956,30 @@ TileIndex Order::GetLocation(const Vehicle *v, bool airport) const
 	}
 }
 
+/**
+ * Returns a tile somewhat representing the order's auxiliary location (not related to vehicle movement).
+ * @param secondary Whether to return a second auxiliary location, if available.
+ * @return auxiliary location of order, or INVALID_TILE if none.
+ */
+TileIndex Order::GetAuxiliaryLocation(bool secondary) const
+{
+	if (this->IsType(OT_CONDITIONAL)) {
+		if (secondary && this->GetConditionVariable() == OCV_CARGO_WAITING_AMOUNT && GB(this->GetXData(), 16, 16) != 0) {
+			const Station *st = Station::GetIfValid(GB(this->GetXData(), 16, 16) - 2);
+			if (st != nullptr) return st->xy;
+		}
+		if (ConditionVariableHasStationID(this->GetConditionVariable())) {
+			const Station *st = Station::GetIfValid(GB(this->GetXData2(), 0, 16) - 1);
+			if (st != nullptr) return st->xy;
+		}
+	}
+	if (this->IsType(OT_LABEL) && IsDestinationOrderLabelSubType(this->GetLabelSubType())) {
+		const BaseStation *st = BaseStation::GetIfValid(this->GetDestination());
+		if (st != nullptr) return st->xy;
+	}
+	return INVALID_TILE;
+}
+
 /**
  * Get the distance between two orders of a vehicle. Conditional orders are resolved
  * and the bigger distance of the two order branches is returned.

src/order_gui.cpp

@@ -2811,6 +2811,7 @@ public:
 
 				if (_ctrl_pressed && sel < this->vehicle->GetNumOrders()) {
 					TileIndex xy = this->vehicle->GetOrder(sel)->GetLocation(this->vehicle);
+					if (xy == INVALID_TILE) xy = this->vehicle->GetOrder(sel)->GetAuxiliaryLocation(_shift_pressed);
 					if (xy != INVALID_TILE) ScrollMainWindowToTile(xy);
 					return;
 				}