Ember Quiz Stats - Fix progress bar in tooltips

Progress bars for the report-generation inside the tooltips should show
the progress updates no matter what!

Closes CNVS-13663

TEST PLAN
---- ----

  - enable NQS
  - go to ember quiz stats
    + click the Student or Item analysis buttons
      - verify the progress bar fills up periodically

Change-Id: If547481110a4a3217f5479ab171b281fe0120a0a
Reviewed-on: https://gerrit.instructure.com/38345
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Josh Simpson <jsimpson@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Ahmad Amireh <ahmad@instructure.com>