message: Implement `Widget::mouse_interaction` for `Container`
diff: @@ -4,6 +4,7 @@ use std::hash::Hash;
  use crate::alignment::{self, Alignment};
  use crate::event::{self, Event};
  use crate::layout;
  +use crate::mouse;
  use crate::overlay;
  use crate::renderer;
  use crate::{
  @@ -175,6 +176,19 @@ where
  )
  }
  + fn mouse_interaction(
  + &self,
  + layout: Layout<'_>,
  + viewport: &Rectangle,
  + cursor_position: Point,
  + ) -> mouse::Interaction {
  + self.content.widget.mouse_interaction(
  + layout.children().next().unwrap(),
  + viewport,
  + cursor_position,
  + )
  + }
  +
  fn draw(
  &self,
  renderer: &mut Renderer,
  