Give Phriction a real dropdown

Summary:
Fixes T8150. Small generalization:

  - Timeline has a dropdown with no special logic; make that generic.
  - Use it in Phriction.

Test Plan:
  - Used Phriction dropdown on desktop and mobile.
  - Used timeline dropdown.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8150

Differential Revision: https://secure.phabricator.com/D12931

src/applications/phriction/controller/PhrictionDocumentController.php

@@ -192,10 +192,19 @@ final class PhrictionDocumentController
       $crumbs->addCrumb($view);
     }
 
+    $action_button = id(new PHUIButtonView())
+      ->setTag('a')
+      ->setText(pht('Actions'))
+      ->setHref('#')
+      ->setIconFont('fa-bars')
+      ->addClass('phui-mobile-menu')
+      ->setDropdownMenu($actions);
+
     $header = id(new PHUIHeaderView())
       ->setUser($user)
       ->setPolicyObject($document)
-      ->setHeader($page_title);
+      ->setHeader($page_title)
+      ->addActionLink($action_button);
 
     if ($content) {
       $header->setEpoch($content->getDateCreated());
@@ -206,16 +215,12 @@ final class PhrictionDocumentController
       $prop_list = new PHUIPropertyGroupView();
       $prop_list->addPropertyList($properties);
     }
-    $action_id = celerity_generate_unique_node_id();
-    $actions->setID($action_id);
 
     $page_content = id(new PHUIDocumentView())
       ->setFontKit(PHUIDocumentView::FONT_SOURCE_SANS)
       ->setHeader($header)
-      ->setActionListID($action_id)
       ->appendChild(
         array(
-          $actions,
           $prop_list,
           $version_note,
           $move_notice,