restore edit link to normal canvas edit page for quizzes

Test Plan:
  - Enable fabulous quizzes
  - Clicking the "edit" button on the show page should take you to the
    normal canvas edit page

closes CNVS-12435

Change-Id: I2acc30159a2d07e55962dcd6046d708a4c16b5f8
Reviewed-on: https://gerrit.instructure.com/33464
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Derek DeVries <ddevries@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Derek DeVries <ddevries@instructure.com>
Product-Review: Stanley Stuart <stanley@instructure.com>