feat(mobile): compatibility message warning (#10065)

* feat(mobile): compatibility message warning

* refactor and better signature

mobile/lib/widgets/forms/login/loading_icon.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class LoadingIcon extends StatelessWidget {
+  const LoadingIcon({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Padding(
+      padding: EdgeInsets.only(top: 18.0),
+      child: SizedBox(
+        width: 24,
+        height: 24,
+        child: FittedBox(
+          child: CircularProgressIndicator(
+            strokeWidth: 2,
+          ),
+        ),
+      ),
+    );
+  }
+}