get rid of double '+' icon on button, fixes: #9498
get rid of double '+' icon on button, fixes: #9498

test plan:
go to /courses/654304/groups and make sure there
are not 2 '+' icons on the "Start a New Group" button

Change-Id: I9ec83be92bedd9a1c0300490764655f33efd1d33
Reviewed-on: https://gerrit.instructure.com/12300
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Jake Sorce <c8d99c2f7cd5f432c163abcd422672b9f77550bb@instructure.com>

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