Open "Help" menu links in a new window

Summary: Fixes T11243. Seems reasonable to open this stuff in a new window so you don't put any application state in Herald, etc., at risk -- looking in this menu for help with a currently-executing workflow is reasonable and normal.

Test Plan: Clicked a help menu link, saw it open in a new page.

Reviewers: avivey, chad

Reviewed By: chad

Maniphest Tasks: T11243

Differential Revision: https://secure.phabricator.com/D16230

src/applications/base/PhabricatorApplication.php

@@ -183,7 +183,8 @@ abstract class PhabricatorApplication
         $item = id(new PHUIListItemView())
           ->setName($article['name'])
           ->setIcon('fa-book')
-          ->setHref($article['href']);
+          ->setHref($article['href'])
+          ->setOpenInNewWindow(true);
 
         $items[] = $item;
       }
@@ -203,7 +204,8 @@ abstract class PhabricatorApplication
         $item = id(new PHUIListItemView())
           ->setName($spec['name'])
           ->setIcon('fa-envelope-o')
-          ->setHref($href);
+          ->setHref($href)
+          ->setOpenInNewWindow(true);
         $items[] = $item;
       }
     }

src/view/phui/PHUIListItemView.php

@@ -29,6 +29,16 @@ final class PHUIListItemView extends AphrontTagView {
   private $indented;
   private $hideInApplicationMenu;
   private $icons = array();
+  private $openInNewWindow = false;
+
+  public function setOpenInNewWindow($open_in_new_window) {
+    $this->openInNewWindow = $open_in_new_window;
+    return $this;
+  }
+
+  public function getOpenInNewWindow() {
+    return $this->openInNewWindow;
+  }
 
     public function setHideInApplicationMenu($hide) {
     $this->hideInApplicationMenu = $hide;
@@ -294,6 +304,7 @@ final class PHUIListItemView extends AphrontTagView {
         'class' => implode(' ', $classes),
         'meta' => $meta,
         'sigil' => $sigil,
+        'target' => $this->getOpenInNewWindow() ? '_blank' : null,
       ),
       array(
         $aural,