Adds move to option for module items

Makes the modules page more accessible for both screenreader and
keyboard only users.

fixes CNVS-9045

  test plan:
    1. Using a screenreader go to the modules page (/courses/##/modules)
    3. Navigate to the admin links cog for a module item.
    4. You should see a "Move to..." option.
    5. Click it using whatever the screenreader uses for click
       (VO: Ctrl+Option+Space)
    6. A dialog should appear (This dialog should be accessible)
    7. You should be able to move a module item to whatever location
       you want.

Change-Id: I7f6cffef2eb321103889fb81e932e9551f8b912e
Reviewed-on: https://gerrit.instructure.com/39930
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Clare Strong <clare@instructure.com>
Product-Review: Cosme Salazar <cosme@instructure.com>
Reviewed-by: Jeremy Stanley <jeremy@instructure.com>