Add alert for onion nodes

lib/src/screens/settings/connection_sync_page.dart

@@ -73,7 +73,7 @@ class ConnectionSyncPage extends BasePage {
                             builder: (BuildContext context) {
                               return AlertWithTwoActions(
                                 alertTitle: S.of(context).change_current_node_title,
-                                alertContent: S.of(context).change_current_node(node.uriRaw),
+                                alertContent: nodeListViewModel.getAlertContent(node.uriRaw),
                                 leftButtonText: S.of(context).cancel,
                                 rightButtonText: S.of(context).change,
                                 actionLeftButton: () => Navigator.of(context).pop(),

lib/view_model/node_list/node_list_view_model.dart

@@ -1,3 +1,4 @@
+import 'package:cake_wallet/generated/i18n.dart';
 import 'package:hive/hive.dart';
 import 'package:mobx/mobx.dart';
 import 'package:cw_core/wallet_base.dart';
@@ -30,6 +31,10 @@ abstract class NodeListViewModelBase with Store {
     return node;
   }
 
+  String getAlertContent(String uri) =>
+      S.current.change_current_node(uri) +
+          '${uri.endsWith('.onion') || uri.contains('.onion:') ? '\n' + S.current.orbot_running_alert : ''}';
+
   final ObservableList<Node> nodes;
   final SettingsStore settingsStore;
   final WalletBase wallet;