new work packages disabled until proven otherwise.

app/assets/javascripts/angular/work_packages/controllers/work-packages-list-controller.js

@@ -56,6 +56,7 @@ angular.module('openproject.workPackages.controllers')
   function initialSetup() {
     $scope.operatorsAndLabelsByFilterType = OPERATORS_AND_LABELS_BY_FILTER_TYPE;
     $scope.disableFilters = false;
+    $scope.disableNewWorkPackage = true;
 
     var getWorkPackages, params;
     if($scope.query_id){

app/controllers/api/experimental/work_packages_controller.rb

@@ -183,6 +183,7 @@ module Api
       def work_packages_links
         links = {}
         links[:create] = api_experimental_query_path(@project) if User.current.allowed_to?(:add_work_packages, @project)
+        links
       end
 
       def query_as_json(query, user)