specs for "add new folder"

closes: CNVS-12728
refs: CNVS-14390

Change-Id: I4c0f62f0e4f5420ff556ce2e63689fa47cc4c27e
Reviewed-on: https://gerrit.instructure.com/39238
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jason Madsen <jmadsen@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>