fix: burg regeneration for ports

modules/ui/tools.js

@@ -428,6 +428,7 @@ function regenerateBurgs() {
   }
 
   pack.burgs = newBurgs; // assign new burgs array
+  Burgs.shift();
 
   // add a capital at former place for states without added capitals
   states
@@ -444,10 +445,6 @@ function regenerateBurgs() {
       Burgs.changeGroup(burg);
     });
 
-  features.forEach(f => {
-    if (f.port) f.port = 0; // reset features ports counter
-  });
-
   Burgs.specify();
   regenerateRoutes();