Missing graphs for new stations

[DKFN]

Reported on SimRail french discord (alternative). Some stations miss the graph configuration to display the graph.

For example dorota does not have knowledge on previous and next posts that would allow it to render the graph view https://github.com/simrail/EDR/blob/master/frontend/src/config/stations.ts#L403 .

Hope you are doing well Crypter, see you :)

[Tallyrald]

Thanks for the report. I'll partially fix this in the next version, but since the graph view only supports a single destination in each direction, this issue will remain as long as the current graph implementation is in use.
Related to #87