批量上传题目Bug

	错误原因是由于batch_update方法里仅仅更新了pending_questions的state字段而没有创建对应的questions
	modified:   app/controllers/application_controller.rb
	modified:   app/controllers/new_admin/pending_questions_controller.rb
	modified:   app/controllers/pending_questions_controller.rb
	modified:   app/views/new_admin/pending_questions/index.html.erb