fix gb2 styles

fixes CNVS-10681

Test plan:
  The appearance of gb2 should match your fond recollections.

Change-Id: I0493afe66dacff4e697d9f8f08f439bf6b031cf3
Reviewed-on: https://gerrit.instructure.com/28980
Reviewed-by: Matthew Irish <mirish@instructure.com>
Reviewed-by: Zach Pendleton <zachp@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Cameron Matheson <cameron@instructure.com>