Change course settings' "more options" to a button
Change course settings' "more options" to a button

sort-of. by adding role="button", screenreaders announce it as such.

fixes CNVS-37150

Test plan:
  - create a course and go to the settings page
  - move focus to the "more options" link at the botom
  > expect screenreaders to announce it as a button, not a link

Change-Id: I417468e7ba5409a76c9a28369a62003d6c7d45fb
Reviewed-on: https://gerrit.instructure.com/115669
Tested-by: Jenkins
Reviewed-by: Jeremy Stanley <b3f594e10a9edcf5413cf1190121d45078c62290@instructure.com>
QA-Review: David Tan <6283e310a2278fc51bdc4fb5974f70dd9c3366b9@instructure.com>
Product-Review: Ed Schiebel <0ca8a83847a5889cf05cb219c0ab09f6b646243b@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms