save before flutter upgrade

lib/helpers/scroll_behavior.dart

@@ -0,0 +1,12 @@
+// Create Custom Scroll Class for web Drap Behaviour:
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+
+class MyCustomScrollBehavior extends MaterialScrollBehavior {
+  // Override behavior methods and getters like dragDevices
+  @override
+  Set<PointerDeviceKind> get dragDevices => {
+        PointerDeviceKind.touch,
+        PointerDeviceKind.mouse,
+      };
+}