closes CNVS-18151
test plan:
* setup MGP
- navigate to a student's grade page
> there should be a dropdown to the left of the 'print' button at the top
> the dropdown should say the current grading period
> the page should only show assignments/grades from the current grading period
- choose a different grading period
> the page should refresh
> the dropdown should show the grading period you chose
> only assignments/grades from that grading period should show
- choose "All Grading Periods"
> it should refresh and show all assignments
Change-Id: I56e1386dff928c16b40c9dcf5d5fe991e69fe4b7
Reviewed-on: https://gerrit.instructure.com/48704
Product-Review: Cameron Sutter <csutter@instructure.com>
Reviewed-by: Spencer Olson <solson@instructure.com>
Tested-by: Jenkins
QA-Review: Amber Taniuchi <amber@instructure.com>