Fix footer display when IconNav is present

Summary: Fixes T7382, specifically we were drawing double navs, removed those from each page and added the correct CSS rule.

Test Plan: Test a number of people and profile pages with a footer set.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7382

Differential Revision: https://secure.phabricator.com/D11895

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -333,9 +333,7 @@ final class PhabricatorProjectBoardViewController
     $nav->appendChild($board_box);
 
     return $this->buildApplicationPage(
-      array(
-        $nav,
-      ),
+      $nav,
       array(
         'title' => pht('%s Board', $project->getName()),
         'showFooter' => false,