another tree view thing

[David Christian Berg <david sipsolutions net>]

Well, playing around with the treeview to reproduce this opening
home-tree bug, I noticed something else:
You can't expand and right away collaps a tree without moving the mouse.
What happens even when you're clicking the expander is that the item
gets selected and the shown folder changes. if you just move your mouse
by a pixel you are fine. The expander doesn't prelight until the new
movement either, so maybe it rather is a gtk bug than a Nautilus bug, or
maybe it is on purpose?

David