Move PhabricatorObjectItem to PHUIObjectItem, add 'plain' setting for lists.

Summary: Adds plain support for object lists that just look like lists

Test Plan: review UIexamples and a number of other applications

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: Korvin, aran

Differential Revision: https://secure.phabricator.com/D6922

src/applications/config/controller/PhabricatorConfigGroupController.php

@@ -70,12 +70,12 @@ final class PhabricatorConfigGroupController
     }
     $engine->process();
 
-    $list = new PhabricatorObjectItemListView();
+    $list = new PHUIObjectItemListView();
     $list->setStackable(true);
     foreach ($options as $option) {
       $summary = $engine->getOutput($option, 'summary');
 
-      $item = id(new PhabricatorObjectItemView())
+      $item = id(new PHUIObjectItemView())
         ->setHeader($option->getKey())
         ->setHref('/config/edit/'.$option->getKey().'/')
         ->addAttribute($summary);