Fix issue with add row adding to both header and data tables.
Fix issue with add row adding to both header and data tables.

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