fix: Possibly fix touchscreen scrolling on Linux phones

Unfortunately I can not test this by myself.

lib/utils/custom_scroll_behaviour.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+
+class CustomScrollBehavior extends MaterialScrollBehavior {
+  @override
+  Set<PointerDeviceKind> get dragDevices => {
+        PointerDeviceKind.touch,
+        PointerDeviceKind.mouse,
+      };
+}