[Redesign] Add ActionIcon to home panels

Summary: Ref T8099, adds an action icon similar to dashboards for taking people to the search.

Test Plan: Click on each icon, verify it takes me to correct URL.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T8099

Differential Revision: https://secure.phabricator.com/D12974

src/applications/home/controller/PhabricatorHomeMainController.php

@@ -319,8 +319,12 @@ final class PhabricatorHomeMainController extends PhabricatorHomeController {
         'href' => $href,
       ),
       $title);
+    $icon = id(new PHUIIconView())
+      ->setIconFont('fa-search')
+      ->setHref($href);
     $header = id(new PHUIHeaderView())
-      ->setHeader($title);
+      ->setHeader($title)
+      ->addActionIcon($icon);
     return $header;
   }