title: How to add sort by date at Magento Backend
body: <p>I want to show all my products by default from newest to oldest. I saw this links:</p>
  
  <p><a href="https://stackoverflow.com/questions/2237513/magento-sort-by-date-added">First solution</a></p>
  
  <p><a href="http://www.magentocommerce.com/boards/viewthread/280314/#t387709" rel="nofollow noreferrer">Second solution</a></p>
  
  <p>And also <a href="http://www.excellencemagentoblog.com/magento-category-page-product-sorting" rel="nofollow noreferrer">this</a> one. All of them show same solution, but always for Frontend.</p>
  
  <p>What I want is to set by default on <strong>System->Configuration->Catalog->Product Listing sort by</strong> and set it by default to <strong>Created at</strong>, and I want also to set the order (desc or asc). </p>
  
  <p>Any ideas on how to customize that?</p>