Render ApplicationSearch errors correctly

Summary:
Fixes T8774. When an ApplicationSearch page returned an error (e.g., using a "viewer()" query while logged out), we would try to add action links to a box without a header. Instead:

  - If a box has no header, but has show/hide actions, just create an empty header so the view renders. This is a little silly looking but does what the caller asks.
  - Always set the title on the result box, so we get a header.

Test Plan: Did an invalid (logged out, with viewer()) search. Did a valid search.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T8774

Differential Revision: https://secure.phabricator.com/D13576

src/applications/search/controller/PhabricatorApplicationSearchController.php

@@ -185,7 +185,11 @@ final class PhabricatorApplicationSearchController
       $title = pht('Advanced Search');
     }
 
-    $box = new PHUIObjectBoxView();
+    $header = id(new PHUIHeaderView())
+      ->setHeader($title);
+
+    $box = id(new PHUIObjectBoxView())
+      ->setHeader($header);
 
     if ($run_query || $named_query) {
       $box->setShowHide(
@@ -227,16 +231,12 @@ final class PhabricatorApplicationSearchController
             $saved_query);
         }
 
-        $header = id(new PHUIHeaderView())
-          ->setHeader($title);
         if ($list->getActions()) {
           foreach ($list->getActions() as $action) {
             $header->addActionLink($action);
           }
         }
 
-        $box->setHeader($header);
-
         if ($list->getObjectList()) {
           $box->setObjectList($list->getObjectList());
         }
@@ -267,8 +267,6 @@ final class PhabricatorApplicationSearchController
           'This query specifies an invalid parameter. Review the '.
           'query parameters and correct errors.');
       }
-    } else {
-      $box->setHeaderText($title);
     }
 
     if ($errors) {