message: fix: panic when using pure component in pure responsive
diff: @@ -67,12 +67,13 @@ impl<'a, Message, Renderer> Content<'a, Message, Renderer> {
  self.element = view(new_size);
  self.size = new_size;
  +
  + tree.diff(&self.element);
  +
  self.layout = self
  .element
  .as_widget()
  .layout(renderer, &layout::Limits::new(Size::ZERO, self.size));
  -
  - tree.diff(&self.element);
  }
  fn resolve<R, T>(
  