[Fix] Show spinner while adding columns

app/assets/javascripts/angular/controllers/dialogs/columns.js

@@ -43,7 +43,8 @@ angular.module('openproject.workPackages.controllers')
   'QueryService',
   'WorkPackageService',
   'WorkPackagesTableService',
-  function($scope, $timeout, $filter, columnsModal, QueryService, WorkPackageService, WorkPackagesTableService) {
+  '$rootScope',
+  function($scope, $timeout, $filter, columnsModal, QueryService, WorkPackageService, WorkPackagesTableService, $rootScope) {
 
   this.name    = 'Columns';
   this.closeMe = columnsModal.deactivate;
@@ -96,7 +97,7 @@ angular.module('openproject.workPackages.controllers')
     if(groupBy.length === 0) groupBy = undefined; // don't pass an empty string as groupBy
 
     if(addedColumns.length) {
-      $scope.refreshWorkPackages = WorkPackageService.augmentWorkPackagesWithColumnsData(currentWorkPackages, addedColumns, groupBy);
+      $rootScope.refreshWorkPackages = WorkPackageService.augmentWorkPackagesWithColumnsData(currentWorkPackages, addedColumns, groupBy);
     }
 
     columnsModal.deactivate();