Add validation, error display for gluetun

src/widgets/gluetun/widget.js

@@ -7,6 +7,11 @@ const widget = {
   mappings: {
     ip: {
       endpoint: "publicip/ip",
+      validate: [
+        "public_ip",
+        "region",
+        "country"
+      ]
     },
   },
 };