additional X to close the modal

mockup/modal.html

@@ -48,6 +48,7 @@
         <div class="modal-dialog" role="document">
             <div class="modal-content">
                 <div class="modal-header">
+                    <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                     <h4 class="modal-title" id="qfqModalTitle101">Loading Document</h4>
                 </div>
                 <div class="modal-body" style="text-align: center;">