fix navigation scoring: consider number of visited landmarks

[max-weisser]

No description provided.

[Copposhop]

To be honest, I would replace the

However, a pass is only counted if the previously required landmarks have already been visited.

in the Sceneario section with a better definition of a "sucessfully visited landmark" or similar.
Then we can just refer to the amount of sucessfully visited landmarks in the scoring section and avoid the redundant definition over there.

[MariusMogk]

To be honest, I would replace the

However, a pass is only counted if the previously required landmarks have already been visited.

in the Sceneario section with a better definition of a "sucessfully visited landmark" or similar. Then we can just refer to the amount of sucessfully visited landmarks in the scoring section and avoid the redundant definition over there.

Clarified what a successfull pass means, removed redundant phrase.
Pls review.

[Copposhop]

I tried to simplify the section about the landmark sequence/order without much redundancy or overly specific definitions.
There is now a clearer definition for a sucessfully visited landmark to distinguish it from simply passing a landmark.