Duplicate token if not taken in step

[Toxantron]

Is your feature request related to a problem? Please describe.
When implementing a WorkplanTransition I just called PlaceToken, but forgot to call TakeToken for the sender. This creates a duplicate which causes issues if the workplan is saved and restored.

I know why the API is that way, but unless you do this daily it's quite easy to forget.

Describe the solution you'd like
Either a dedicated method to move the token from Input to correct output or a check within PlaceToken if an input still holds the token.

Describe alternatives you've considered

Additional context