Change tab menus to be built as-needed and more cleanly.
Change tab menus to be built as-needed and more cleanly.

bheekin/n-cube-editor,jsnyder4/n-cube-editor,kpartlow/n-cube-editor,bheekin/n-cube-editor,jdereg/n-cube-editor,tympollack/n-cube-editor,jdereg/n-cube-editor,jsnyder4/n-cube-editor,kpartlow/n-cube-editor,jdereg/n-cube-editor,tympollack/n-cube-editor