fix back to course settings button link destination to proper context
fix back to course settings button link destination to proper context

fixes CNVS-18309

test plan:

- Navigate to a course section
- Verify after clicking on the "Back to Course Settings" button
  you are taken to the proper endpoint /settings instead of the blank
  view /details like prior behavior

Change-Id: I654cd56fd10f42efea7863754c9449c15e6ce493
Reviewed-on: https://gerrit.instructure.com/48105
Tested-by: Jenkins
Reviewed-by: James Williams  <3a5f4ed991dbfa5c9ef76ad729d240ca12f62180@instructure.com>
QA-Review: Jeremy Putnam <b030d6d6f199f844ec424882be473c2ab9adc93b@instructure.com>
Product-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>

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