Front end access points on Quiz Moderate for Outstanding QS

Previous workaround for student submissions which were outstanding was
to visit each individual quiz show page from the moderate page.  This
cleans up the moderate page with the ember styling, and adds the
functionality of outstanding quiz checking and submitting through the
API endpoint.

Closes CNVS-15502, CNVS-16197

Test Plan:
  - Basically, a QA regression of the quiz moderate page
    - ensure all quiz extensions still function
    - ensure icons for manually unlocked, in progress time alterations,
      and quiz extension notices are present
  - Check for outstanding quiz extensions button functionality
    - Shows an alert on page refresh if outstanding quiz submissions
      exist
    - Submits the selected submissions
    - Hides alert if all the outstanding submissions were submitted,
      otherwise shows the success flash message, but retains the alert
    - Overflows with large lists

Change-Id: Idba6a4849a3dc32fe9c077236a7fa13a6db6ce00
Reviewed-on: https://gerrit.instructure.com/41441
QA-Review: Trevor deHaan <tdehaan@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Derek DeVries <ddevries@instructure.com>
Product-Review: Ryan Taylor <rtaylor@instructure.com>