The reconfigure method is called in an infinite loop after the first call.

Steps to reproduce :

1. Open the script tool in the CMS context
2. Create the script :

   var programs = [];
   jcrXPathQuery("//element(*, ametys:programContent)").forEach(function(program) { programs.push(program); });
   return contents([], programs);

3. Execute it twice
4. The second time, the grid is reloaded infinitely