Add back removed css for tree links #148
Add back removed css for tree links #148

* The styling needed for tree links was removed in 875e78f

Signed-off-by: Jillian Daguil <8e927abf8e72a52d2816b020862fa1a32fbeb0d6@nexb.com>

nexB/aboutcode-manager,nexB/aboutcode-manager,nexB/aboutcode-manager