Fix issue where could not click first tab when LHN is closed due to DOM node overlap.
Fix issue where could not click first tab when LHN is closed due to DOM node overlap.

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