fixes CNVS-9282
this commit adds input validation to quiz groups for pick_count and
question_points, requiring the data given by the user to be numerical.
Test Plan
1. Create a Question Group with non-numerical values for pick count and
question points.
- Validation should fail and alert the user.
Change-Id: I13b1c95763504afd13f2f16e1a2de190e836c085
Reviewed-on: https://gerrit.instructure.com/26656
Reviewed-by: Derek DeVries <ddevries@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Myller de Araujo <myller@instructure.com>
Product-Review: Josh Simpson <jsimpson@instructure.com>