title: Sonata and export csv and xls
body: <p>I have a problem with exportation of list in sonata:</p>
  
  <p>If I build the CSV file, with office 2016 i see a wrong table (because the delimiter is "<code>,</code>")</p>
  
  <p>If I use XLS file, I can see the file, but office show an alert before open.</p>
  
  <p>my questions are:</p>
  
  <ol>
  <li>is possible change delimiter of CSV?</li>
  <li>is possible export XLSX file from the same menu? (in image) </li>
  </ol>
  
  <p><a href="https://i.stack.imgur.com/oo1fu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oo1fu.png" alt="enter image description here"></a></p>
  
  <p>I found a link but I don't  understand to use 
  <a href="https://github.com/sonata-project/SonataAdminBundle/issues/2707" rel="nofollow noreferrer">https://github.com/sonata-project/SonataAdminBundle/issues/2707</a></p>
  
  <p>thank you</p>