Replace double click with single click for tests simplicity

Author: Tyschenko

download_file.html

@@ -47,7 +47,7 @@
 
 <div class="note">Click on Red icon to download a file</div>
 
-<div class="red-square" id="download_button" ondblclick="triggerDownload()"></div>
+<div class="red-square" id="download_button" onclick="triggerDownload()"></div>
 
 <script>
     function triggerDownload() {