Fix points i18n on Add Group dialog
Fix points i18n on Add Group dialog

Test Plan:
- Create a bank with at least one question
- Set the course language to french (or similar locale with localized
  numbers)
- Create a new quiz
- Click "Find Question" (the third button with a magnifying glass)
- Select the existing bank and select "[New Group]" (the last item in
  the drop down)
- in the new dialog that appears, enter localized points, like `1,5` or
  similar
- expect it to save correctly

Closes QO-517

Change-Id: Ia87e451ec066da3fd1ac6a6db5aaceb816d18f5b
Reviewed-on: https://gerrit.instructure.com/211645
Tested-by: Jenkins
Reviewed-by: Stephen Kacsmark <90aaf30f5583a54f0f3cdbd115e37bda3a251932@instructure.com>
QA-Review: Robin Kuss <0b206b54367b2de0334896ea45826f0e3194bd35@instructure.com>
Product-Review: Kevin Dougherty III <d976013e3ceb631f24c072156980cd9ccba4cf84@instructure.com>

instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms