outcome gradebook student cell looks more like gradebook

fixes CNVS-10620

test plan
- ensure that outcome gradebook student cells look like gradebook2
 student cells
- ensure that student names link to the student's grade page
- ensure that gradebook2 student cell looks the same as it did

Change-Id: I56797037e5980c7a6162677f24c2ff74fef2939d
Reviewed-on: https://gerrit.instructure.com/29760
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Matt Fairbourn <mfairbourn@instructure.com>
Reviewed-by: Braden Anderson <banderson@instructure.com>
Product-Review: Matt Goodwin <mattg@instructure.com>