Utilities ver. 1.8
ADDED a new option to display children's IDs while inspecting a cube.
I have to admit, it took me longer than I expected, but here it is.
The option is turned OFF by default - you have to turned it on in the Settings menu (option name's "Show children's IDs").
When the option is turned on and you inspect a cube and click the button to show children, something like this will show:
On each wall IDs of the children associated with that wall will be displayed.
Double click on an ID will jump you to the corresponding child.
I didn't do the same for parents, because there's always only one parent for each cube.
It might be useful for searching those hidden children, when a branch doesn't grow.