fix(track): the cab keeps the shake a track doesn't replace, and the editor redraws all that an edit changes

The side sway from the lateral acceleration now goes off only on a track with a sideways value, and the random jolts on one with a vertical or a sideways value. Dips at the rail joints and cross level alone replace neither. On a switch it goes by the path set and what its joined tracks allow.

An edit in the editor also rebuilds the other switches of a joined group with the tracks they meet, and the tracks of a rail run whose joints moved. Removing a track does the same. While dragging, the tracks further off wait until the drag ends.

The clatter of a bogie's axles was right: the followers stand at the pivots and the offsets are the places of the wheel sets. The misleading name goes.

Also what Sonar had left: a parameter as a span, a const method, a struct and its member apart, commented out code, and a function of the grading tool split, with the same output.

world/Segment.h

@@ -59,7 +59,8 @@ class TSegment
         int path { 0 }; // which path of a switch
         // where the path meets the next one: the middle of their ends and their common vector across
         std::array<std::optional<std::pair<glm::dvec3, glm::dvec3>>, 2> joints;
-    } m_setting;
+    };
+    setting m_setting;
     double fLength { -1.0 }; // długość policzona
     std::vector<double> fTsBuffer; // wartości parametru krzywej t dla równych odcinków s
     std::vector<double> fTsSlope; // nachylenie dt/du (= dt/ds * fStep) w tych samych punktach