[Portugal] Sea routes and towns fix

[Grimiku]

Ok, so that was a bit of a pain to fix as it goes against quite a few established rules.

Basically during a playthrough in my group some people instinctively assumed that you wouldn't need to have urbanized Sines or Sagres to establish a sea connection through them to Madeira or Lisboa. After some research it actually turned out (quite surprisingly) to be true.

Details are in the lengthy exchange here. In that thread it has been explicitly stated by both the publisher AND the designer to be true.

What needed to be overwritten was:
a) possibility to build towards an unpassable edge for those 2 locations;
b) possibility to move goods through respective connections;
c) making sure the track to an unpassable edge won't dangle on next build phase end;

Still looks a bit off on the UI side but I'm not sure if much can be done about it.

[YourDeveloperFriend]

Sorry, I know I have been putting this off. Ideally, this logic should be contained in a module and reusable, because we now have multiple maps that exhibit this behavior and I don't want to keep duplicating it. Heavy Cardboard and Denmark both do something similar. Can you look at those and see if we can consolidate?

[Grimiku]

Sure, will check next week most likely. Potentially will open new PR and close this one.

[Grimiku]

Actually, would you mind merging this one for the time being? We have a game that's stalled because of it.

[Grimiku]

Thanks, appreciate it!