For some reasons the inputs don't reach the onAction method.
I've tried adding it as a RawInputListener.
Events are emitted, as I've seen them in debug in the camera class (which is also a RawInputListener)
There I can see that the VehicleEditorController is indeed in the list.

Why would events come to the camera, but not the VehicleEditorController?

The only reason I can see is if the event is consumed, somehow. But why? And who?