Dagre orders sibling nodes by node-insertion order and ignores handle
ids, so after auto-layout a host's children were frequently laid out in
the reverse of the ports they plug into. Add a post-pass that keeps
Dagre's X slots but reassigns which child sits in each, sorted by the
parent's bottom-port index, shifting each child's whole subtree by the
same delta so nested nodes follow their parent. Peer-group members are
skipped so the existing peer layout is untouched.
ha-relevant: yes
Pouzor
7fdce6af37