fix editing questions when there are more than 25 questions
fix editing questions when there are more than 25 questions

test plan:
  - As a teacher, create a quiz with more than 25 questions.
  - Refresh the edit page and click on the "Questions" tab.
  - You should be able to edit quiz questions at the end of the list
    (e.g. questions after question #25).

fixes CNVS-10212

Change-Id: I9045f91f527d31048ce3da24fa91b36c9e79a4de
Reviewed-on: https://gerrit.instructure.com/27967
Reviewed-by: Ahmad Amireh <a53a33601b8dd9d06ae9e50f1f30fbe957aba866@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Myller de Araujo <e5c7c5e1b7f2ce5e9870cc98ec52b20b3006cb48@instructure.com>
Product-Review: Stanley Stuart <2b43fb8b7a234825d50dd49ce7892d78a59da8f3@instructure.com>

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