Makes a11y message on course home page for modules better
Makes a11y message on course home page for modules better

This fixes style problems causing the a11y Drag N Drop
message to show all the time.  It basically makes it so the
proper styles load on that page when needed.

fixes CNVS-20052

Test Plan:
  - Set the modules page as the home page.
  - It should not show the a11y message until you have
    keyboard focus on the drag handle for a module.

Change-Id: I5492ee59b91e48ecca5f0a3e16ac9564ae8483a1
Reviewed-on: https://gerrit.instructure.com/52964
Tested-by: Jenkins
Reviewed-by: James Williams  <3a5f4ed991dbfa5c9ef76ad729d240ca12f62180@instructure.com>
QA-Review: Jahnavi Yetukuri <ed2b2672ccc2e59e56c0615df7f01b579202e014@instructure.com>
Product-Review: Clay Diffrient <9dff2e5c98626d20d2848250c411e8009465bb87@instructure.com>

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