The navigation list on the left was achieved by placing an idx.layout.PartialListNavController inside of each dijit.TitlePane
Each PartialListNavController is mapped to a subset of the panes contained in this dijit.layout.StackContainer
In order to style the TitlePanes to use the appropriate nested navigation styling, a class attribute of "idxNestedNavigation" should be specified on a content pane that surrounds the group of objects making up the navigation list.