### Godot version

4.1.1

### System information

linux

### Issue description

![image](https://github.com/godotengine/godot-proposals/assets/71937306/04dcf0e9-1c0d-4a7f-8ca9-827dd281253a)

![image](https://github.com/godotengine/godot-proposals/assets/71937306/aa70e31e-0486-455a-b8b4-7e589ec7b754)

notice how the first option in the list is never aligned with the button that spawned it.

### Steps to reproduce

right click in the FileSystem dock and hover over the `Create New →` option.

### Minimal reproduction project

editor
return mouse_over;
}
void PopupMenu::set_item_count(int p_count) {
	ERR_FAIL_COND(p_count < 0);
	int prev_size = items.size();
	if (prev_size == p_count) {
		return;
	}
	items.resize(p_count);
	if (prev_size < p_count) {
		for (int i = prev_size; i < p_count; i++) {
			items.write[i].id = i;
		}
	}
	control->queue_redraw();
	child_controls_changed();
	notify_property_list_changed();
	_menu_changed();
}
int PopupMenu::get_item_count() const {
	return items.size();
}
void PopupMenu::scroll_to_item(int p_idx) {