fix: shouln't be able to see "My contacts" menu if you have no safes.

lib/screens/home.dart

@@ -164,6 +164,7 @@ class _HomeScreenState extends State<HomeScreen> {
                     );
                   },
                 ),
+                if (isWalletsExists)
                   ListTile(
                     key: keyContacts,
                     title: Text('contactsManagement'.tr()),