graduation_tasks export xlsx add fileDownload

app/controllers/graduation_tasks_controller.rb

@@ -149,6 +149,7 @@ class GraduationTasksController < ApplicationController
         else
           respond_to do |format|
             format.xlsx{
+              set_export_cookies
               graduation_work_to_xlsx(@work_excel,@task,current_user)
               task_export_name_ = "#{current_user.real_name}_#{@course.name}_#{@task.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
               render xlsx: "#{task_export_name_.strip}",template: "graduation_tasks/tasks_list.xlsx.axlsx",locals: {table_columns:@head_cells_column, task_users:@task_cells_column}