Add isotope, categories for announcement page, sort for announcement

app/controllers/admin/pages_controller.rb

@@ -31,6 +31,7 @@ class Admin::PagesController < ApplicationController
     @designs = Design.all.entries
     @design = @item.design ? @item.design : @designs.first
     @app_frontend_urls = @item.module_app.app_pages if @item.module_app
+    @categories =  BulletinCategory.all if @item.module_app && @item.module_app.key.eql?('announcement')
   end
 
   def create