[BUG] Scroll doesn't work on web

[Carmelo992]

With Flutter 3.3 the scroll doesn't work.

In the class "selection_picker.dart" the Scrollbar must have the same ScrollController of the ListView

ScrollController _controller = ScrollController();

....
Scrollbar(
        controller: _controller,
        child: ListView.builder(
                controller: _controller,
                ....