Simplify returning to upper level after going too deep in nested tree in management model view

When navigating too deep in tree view in management model view or deployment view it is difficult to return back to higher level. You have to hit the refresh button, thus close the tree or resize the tree panel by dragging the scrollbar to the right. Although this solution may not be obvious at first sight.
There should be a horizontal scrollbar too to simplify the tree navigation.
This also affects the deployment tree view.