using setTimeout in save button

js/pgm_construction.js

@@ -226,7 +226,7 @@ function blob_download() {
   link.href = generate_blob() ;
   document.body.appendChild(link) ;
 
-  window.requestAnimationFrame(function () {
+  setTimeout(function () {
     var event ;
     if(typeof MouseEvent !== 'function') {
       event = document.createEvent("MouseEvent");
@@ -236,7 +236,7 @@ function blob_download() {
     }
     link.dispatchEvent(event);
     document.body.removeChild(link);
-  });
+  }, 66);
 }
 
 /* load the saved data */