fix confusing keyboard nav in quizzes with screen reader
fix confusing keyboard nav in quizzes with screen reader

fixes CNVS-6529

test plan:
  - make sure draft-state is turned off
  - go to the quizzes index page
  - edit/delete links should be read after other sections of a quiz
  - quizzes should still appear as they did before

Change-Id: I5b9db48e064b380fd0c0e885896cd5a8f508b345
Reviewed-on: https://gerrit.instructure.com/25488
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Myller de Araujo <e5c7c5e1b7f2ce5e9870cc98ec52b20b3006cb48@instructure.com>
Reviewed-by: Stanley Stuart <2b43fb8b7a234825d50dd49ce7892d78a59da8f3@instructure.com>
Product-Review: Derek DeVries <ff87a0776152510efd53bb1f4ea089dbbc90e730@instructure.com>

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