feat(track): the blades of the switches laid in the editor shaped from their templates with the frogs still whole: the blades alone are on (track_features::blades), the rails cut at the frogs, the wing and the check rails stay off. A switch with the key frogs draws its blades from the tip where their planed nose ends to the heel, bent as they're thrown, the rail behind them from the heel on, where they were laid from the start of the switch before; on a switch of the catalogue they start at the cut tip of the tables, 1.248 m from the joint at R 190, 1.5 m at R 300. The plain track a blade of a double switch runs on into starts its rail behind the heel. The switches without the key, laid by other tools, and the ones of a double slip, whose blades end short of crossings found only with the rails cut, keep the blades they had. The paths the vehicles run on don't change

world/TrackFeatures.h

@@ -17,5 +17,8 @@ namespace track_features {
 bool constexpr crossings { false };
 // the 3D sleepers and switch timbers of sleepers3d; off, the tracks keep their ballast whatever eu07.ini sets
 bool constexpr sleepers { false };
+// the blades of the switches with the key frogs shaped as their templates have them, from the tip their planed nose ends at to the heel,
+// with the rails left whole where the crossings are off; off with the crossings too, they're laid from the start of the switch as before
+bool constexpr blades { true };
 
 } // namespace track_features