Allow EditEngine create and edit forms to be reordered

Summary:
Ref T9132. Ref T9908. Puts reordering UI in place:

  - For create forms, this just lets you pick a UI display order other than alphabetical. Seems nice to have.
  - For edit forms, this lets you create a hierarchy of advanced-to-basic forms and give them different visibility policies, if you want.

Test Plan:
{F1017842}

  - Verified that "Edit Thing" now takes me to the highest-ranked edit form.
  - Verified that create menu and quick create menu reflect application order.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9132, T9908

Differential Revision: https://secure.phabricator.com/D14704

src/applications/transactions/controller/PhabricatorEditEngineConfigurationListController.php

@@ -8,11 +8,44 @@ final class PhabricatorEditEngineConfigurationListController
   }
 
   public function handleRequest(AphrontRequest $request) {
-    $this->setEngineKey($request->getURIData('engineKey'));
+    $viewer = $this->getViewer();
+
+    $engine_key = $request->getURIData('engineKey');
+    $this->setEngineKey($engine_key);
+
+    $engine = PhabricatorEditEngine::getByKey($viewer, $engine_key);
+
+    $items = array();
+    $items[] = id(new PHUIListItemView())
+      ->setType(PHUIListItemView::TYPE_LABEL)
+      ->setName(pht('Form Order'));
+
+    $sort_create_uri = "/transactions/editengine/{$engine_key}/sort/create/";
+    $sort_edit_uri = "/transactions/editengine/{$engine_key}/sort/edit/";
+
+    $can_edit = PhabricatorPolicyFilter::hasCapability(
+      $viewer,
+      $engine,
+      PhabricatorPolicyCapability::CAN_EDIT);
+
+    $items[] = id(new PHUIListItemView())
+      ->setType(PHUIListItemView::TYPE_LINK)
+      ->setName(pht('Reorder Create Forms'))
+      ->setHref($sort_create_uri)
+      ->setWorkflow(true)
+      ->setDisabled(!$can_edit);
+
+    $items[] = id(new PHUIListItemView())
+      ->setType(PHUIListItemView::TYPE_LINK)
+      ->setName(pht('Reorder Edit Forms'))
+      ->setHref($sort_edit_uri)
+      ->setWorkflow(true)
+      ->setDisabled(!$can_edit);
 
     return id(new PhabricatorEditEngineConfigurationSearchEngine())
       ->setController($this)
       ->setEngineKey($this->getEngineKey())
+      ->setNavigationItems($items)
       ->buildResponse();
   }