R1:6587c1d5a5b6

Add a "byline" element to ObjectItemListView

Summary: At least for non-workboard views, try plain text for author information instead of profile images. Some discussion in D5451.

Test Plan:
{F39411}
{F39412}
{F39413}
{F39414}
{F39415}
{F39416}

Reviewers: chad

Reviewed By: chad

CC: AnhNhan, aran

Differential Revision: https://secure.phabricator.com/D5605