Fix #8922: Show vehicle window for single vehicle in shared order grouping (#8926)

src/group_gui.cpp

@@ -892,7 +892,11 @@ public:
 						/* We do not support VehicleClicked() here since the contextual action may only make sense for individual vehicles */
 
 						if (vindex == v->index) {
-							ShowVehicleListWindow(v);
+							if (vehgroup.NumVehicles() == 1) {
+								ShowVehicleViewWindow(v);
+							} else {
+								ShowVehicleListWindow(v);
+							}
 						}
 						break;
 					}

src/vehicle_gui.cpp

@@ -1830,12 +1830,18 @@ public:
 						break;
 					}
 
-					case GB_SHARED_ORDERS:
+					case GB_SHARED_ORDERS: {
 						assert(vehgroup.NumVehicles() > 0);
+						const Vehicle *v = vehgroup.vehicles_begin[0];
 						/* We do not support VehicleClicked() here since the contextual action may only make sense for individual vehicles */
 
-						ShowVehicleListWindow(vehgroup.vehicles_begin[0]);
+						if (vehgroup.NumVehicles() == 1) {
+							ShowVehicleViewWindow(v);
+						} else {
+							ShowVehicleListWindow(v);
+						}
 						break;
+					}
 
 					default: NOT_REACHED();
 				}