Add temporary debugger instruction to downloadFiles

When download is initiated by a normal user, it won't stop here, however
when the dev console is open, then it will stop here.

src/main/webapp/filesFragment.xhtml

@@ -401,6 +401,7 @@
             <f:facet name="header">
                 <script type="text/javascript">
                     function downloadFiles(url, filelist) {
+                        debugger;
                         filelist = filelist + ','; //Prevents last file from being dropped on server
                         var form = $('<form></form>').attr('action', url).attr('method', 'post').attr('enctype', 'text/plain');
                         form.append($("<input></input>").attr('type', 'hidden').attr('name', 'fileIds').attr('value', filelist));