(Archived) Feature request: Collapse and expand all stacks

[Mayerovitch 5]

Currently we can collapse or expand a single stack by clicking on the little triangle to the left of the stack name. It would be handy if there were a Collapse Stacks option in the View menu that would collapse all stacks so that we could have an overview of the entire data structure in its most compact form. An Expand Stacks option would expand all stacks and bring all notebooks into view.