message: Avoid reopening `Menu` in `ComboBox`
diff: @@ -19,6 +19,7 @@ where
  text_size: Option<u16>,
  font: Renderer::Font,
  style: <Renderer as self::Renderer>::Style,
  + is_open: bool,
  }
  #[derive(Default)]
  @@ -38,6 +39,8 @@ where
  selected: Option<T>,
  on_selected: impl Fn(T) -> Message + 'static,
  ) -> Self {
  + let is_open = state.menu.is_open();
  +
  Self {
  menu: &mut state.menu,
  on_selected: Box::new(on_selected),
  @@ -48,6 +51,7 @@ where
  padding: Renderer::DEFAULT_PADDING,
  font: Default::default(),
  style: Default::default(),
  + is_open,
  }
  }
  @@ -179,8 +183,11 @@ where
  _renderer: &Renderer,
  _clipboard: Option<&dyn Clipboard>,
  ) {
  + if !self.is_open {
  match event {
  - Event::Mouse(mouse::Event::ButtonPressed(mouse::Button::Left)) => {
  + Event::Mouse(mouse::Event::ButtonPressed(
  + mouse::Button::Left,
  + )) => {
  if layout.bounds().contains(cursor_position) {
  let selected = self.selected.as_ref();
  @@ -194,6 +201,7 @@ where
  _ => {}
  }
  }
  + }
  fn draw(
  &self,
  