[flexcoders] Maintaining component state across sessions

[Hans Omli]

I need to maintain the state of a handful of components across sessions in
an AIR/Flex app.  I've written a HistoryManager, but it doesn't go down to
the level of selected item, which nodes are opened/closed, scroll position,
and so on.  The data for all components is dynamic, so I also need to check
if selected items, opened nodes, or otherwise still exist.
Anyone come up with an elegant way to accomplish this?