title: phpmyadmin 4.8.5 export page is blank
body: <p>start phpmyadmin, click on Export tab, displays blank page. would prefer working export page.</p>
  
  <p>Database Server version: 5.5.59-log
  PHP version: 5.6.40
  phpMyAdmin: Version 4.8.5</p>
  
  <p>does not matter where you start, clicking the export tab displays a blank page.</p>
  
  <p>tried lots of solutions online, none worked, most did not apply to version 4.8.5.</p>
  
  <p>no javascript / jquery errors, no php errors, no server errors</p>
  
  <p>The 4.8.5 is a clean installation in a new folder. updating from 4.7.2 which ran without problems. used same config.inc.php file.</p>