Transform traffic controls along with lanelets

[adscib]

I noticed that the transform wasn't being applied to the traffic controls when exporting the network, resulting in them being placed away from the map when a custom transformer is used. This fixes the problem for my use case, but I wasn't sure what's the proper way to do the fix, in particular how to copy the traffic control objects.

[smaierhofer]

Thank you for reporting the bug and providing a fix!! I think modifying the objects directly as you did is the best option. We also did it similarly here.