### 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
if (p_idx < 0) {
		p_idx += get_item_count();
	}
	ERR_FAIL_INDEX(p_idx, items.size());
	if (items[p_idx].shortcut_is_disabled == p_disabled) {
		return;
	}
	items.write[p_idx].shortcut_is_disabled = p_disabled;
	control->queue_redraw();
	_menu_changed();
}
void PopupMenu::toggle_item_multistate(int p_idx) {
	ERR_FAIL_INDEX(p_idx, items.size());
	if (0 >= items[p_idx].max_states) {
		return;
	}
	++items.write[p_idx].state;
	if (items.write[p_idx].max_states <= items[p_idx].state) {
		items.write[p_idx].state = 0;
	}
	control->queue_redraw();
	_menu_changed();
}
bool PopupMenu::is_item_checkable(int p_idx) const {