Add new Ysort node that can work with any nodes, not only children

[me2beats]

I had cases when I need to use Ysort, that could work with nodes which are not Ysort children.
So I had to remove those nodes and add them to the Ysort, which is not so handy.

I think a new Ysort node could be added that will use nodes paths for example rather than children

[Zireael07]

I believe we already have an open proposal for something like that? #1237

[me2beats]

deep means it still uses children (and grandchildren etc).
but what if the node isn't there?
you still would remove_child()/add_child()