[routing] Remove passed intermediate points when assembling a modified route mid-navigation

Fixes OM #9592

Signed-off-by: Michał Brzozowski <www.haxor@gmail.com>

map/routing_manager.hpp

@@ -354,6 +354,8 @@ private:
 
   void SetPointsFollowingMode(bool enabled);
 
+  void RemovePassedPoints();
+
   void ReorderIntermediatePoints();
 
   m2::RectD ShowPreviewSegments(std::vector<RouteMarkData> const & routePoints);