### Godot version

v4.0.stable.official [92bee43ad]

### System information

Windows 10, 64bit

### Issue description

When change `ItemList`‘s icon_scale with code, itemlist not update:
![GIF](https://user-images.githubusercontent.com/35988767/222378909-ff9828aa-6714-478a-abbe-55477f28d85d.gif)

And force call `queue_redraw()`, icon size was udpate, but item border not.
![GIF](https://user-images.githubusercontent.com/35988767/222379478-832c7668-5182-4e1e-bfdb-cc137c19f77a.gif)

And if resize window, itemlist update correct.
![GIF](https://user-images.githubusercontent.com/35988767/222381049-3a45383d-9a40-4598-b64d-ec10d22754d7.gif)


### Steps to reproduce

/

### Minimal reproduction project

[ItemListTest.zip](https://github.com/godotengine/godot/files/10869385/ItemListTest.zip)

if (items.is_empty()) {
		return true;
	}
	Vector2 pos = p_pos;
	pos -= theme_cache.panel_style->get_offset();
	pos.y += scroll_bar->get_value();
	if (is_layout_rtl()) {
		pos.x = get_size().width - pos.x;
	}
	Rect2 endrect = items[items.size() - 1].rect_cache;
	return (pos.y > endrect.position.y + endrect.size.y);
}
String ItemList::get_tooltip(const Point2 &p_pos) const {