message: Implement `Operation::scrollable` for `element::Map`
diff: @@ -316,6 +316,14 @@ where
  ) {
  self.operation.focusable(state, id);
  }
  +
  + fn scrollable(
  + &mut self,
  + state: &mut dyn widget::operation::Scrollable,
  + id: Option<&widget::Id>,
  + ) {
  + self.operation.scrollable(state, id);
  + }
  }
  self.widget
  