Hook up the mod list writer

lib/game.dart

@@ -249,12 +249,7 @@ class GameServerPageState extends State<GameServerPage> {
                       });
 
                       // Generate the actual mod list now
-                      await settings.createServerModFolderIfNotExists();
+                      await settings.writeOutModListFile();
-                      if (Platform.isWindows) {
-                        // Save the paths exactly
-                      } else {
-                        // Save the paths relative to the Z: drive
-                      }
                     }
                   },
                 ),