[Gtk-sharp-list] NodeStore and lazy loading

[Ben Maurer]

> Hey Ben,
>
> For 2, can't you intially add a dummy child node (so the expander
> arrow shows up), and then connect to the test-expand-row signal (can't
> lookup the name in Gtk#) and then load the children for that node?

One issue with this: the event occurs on the TreeView, not on the store.
Making the store depend on the events in the view is a bit nasty.

-- Ben