Tree root component. Renders the tree DIVs and javascript to show
a dojo tree.
author: Daniel Lichtenberger (daniel.lichtenberger@flexive.com), UCS - unique computing solutions gmbh (http://www.ucs.at) version: $Rev: 1 $
Return true if the document icons extension of the dojo tree should be used.
If this is enabled, the tree node icons are determined by the node type ("nodeDocType")
and are not rendered in the node itself.
true if the document icons extension of the dojo tree should be used.