DA - scope naming and filtering

fixes CNVS-15925

test plan:
  - quick regression test of DA
    - focus on assignments/quiz/discussion/modules index pages

Change-Id: I0c6fe67f14e0692d54727839ece993037fc4f6ca
Reviewed-on: https://gerrit.instructure.com/41958
Reviewed-by: Cameron Sutter <csutter@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Sean Lewis <slewis@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>