Add a11y title to delete quiz ip filter icon

fixes: #CNVS-13908

test plan:
go to "/accounts/{id}/settings"
add some quiz ip filter ranges.
using NVDA, make sure the delete 'x' says 'Remove Filter'

Change-Id: I8e2c4421ec7f04e3bd0b957fa50a0df8e0aa1813
Reviewed-on: https://gerrit.instructure.com/37643
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Willesen <jonw@instructure.com>
QA-Review: Clare Strong <clare@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>