Improve design of PhabricatorObjectListView
Summary: See discussion in T2014. Aligns this element more closely with @chad's frame_v3.psd mock, and implements the icon/label element. Removes "details".
Test Plan: {F27062} {F27063} {F27064} {F27065}
Reviewers: btrahan, chad
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2014
Differential Revision: https://secure.phabricator.com/D4179