message: Update document title properly in `iced_web`
diff: @@ -143,7 +143,10 @@ pub trait Application {
  instance.spawn(command);
  let window = web_sys::window().unwrap();
  +
  let document = window.document().unwrap();
  + document.set_title(&instance.title);
  +
  let body = document.body().unwrap();
  let vdom = dodrio::Vdom::new(&body, instance);
  @@ -153,6 +156,7 @@ pub trait Application {
  #[derive(Clone)]
  struct Instance<Message> {
  + title: String,
  ui: Rc<RefCell<Box<dyn Application<Message = Message>>>>,
  }
  @@ -162,14 +166,25 @@ where
  {
  fn new(ui: impl Application<Message = Message> + 'static) -> Self {
  Self {
  + title: ui.title(),
  ui: Rc::new(RefCell::new(Box::new(ui))),
  }
  }
  fn update(&mut self, message: Message) {
  let command = self.ui.borrow_mut().update(message);
  + let title = self.ui.borrow().title();
  self.spawn(command);
  +
  + let window = web_sys::window().unwrap();
  + let document = window.document().unwrap();
  +
  + if self.title != title {
  + document.set_title(&title);
  +
  + self.title = title;
  + }
  }
  fn spawn(&mut self, command: Command<Message>) {
  