"Create Application" button in OAuth Server application should be greyed out if user does not have correct capabilities.

Summary: Fixes T7497, "Create Application" button in Oauth Server application should be greyed out if user does not have correct capabilities and should open a "You Shall Not Pass" modal.

Test Plan: Login as non-admin, open OAuth Server application, "Create Application" button should be greyed out, and clicking it should open a modal dialog over the list view without navigating away from it.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7497

Differential Revision: https://secure.phabricator.com/D12560

src/applications/oauthserver/controller/client/PhabricatorOAuthClientListController.php

@@ -25,10 +25,15 @@ final class PhabricatorOAuthClientListController
   protected function buildApplicationCrumbs() {
     $crumbs = parent::buildApplicationCrumbs();
 
+    $can_create = $this->hasApplicationCapability(
+        PhabricatorOAuthServerCreateClientsCapability::CAPABILITY);
+
     $crumbs->addAction(
       id(new PHUIListItemView())
         ->setHref($this->getApplicationURI('client/create/'))
         ->setName(pht('Create Application'))
+        ->setDisabled(!$can_create)
+        ->setWorkflow(!$can_create)
         ->setIcon('fa-plus-square'));
 
     return $crumbs;