1 Float the Navigation toolbar
2 Try to drag the right edge
Expected: edge moves, esp. since the resize cursor icon is shown
Observed: edge does not move
Note: at least some of the time, other toolbars' resize cursor does work.
Workaround:
1 dock the toolbar at the top of the tree
2 rewidth the tree to the desired toolbar width
3 float the toolbar taking care not to drag it across any other dockable position
4 restore the tree width.
EDIT(TC) Tracked at
http://www.ventismedia.com/mantis/view.php?id=6823