💄 make Available area visible by default

src/app/app.service.ts

@@ -147,7 +147,7 @@ export class AppService {
               //'© <a href="geoportal.cuzk.cz" target="_blank">ČÚZK</a>',
             ],
           }),
-          visible: false,
+          visible: true,
         }),
         new Tile({
           properties: {