New: show indicator when deleting a series

src/UI/Series/Delete/DeleteSeriesTemplate.hbs

@@ -40,6 +40,7 @@
         </div>
     </div>
     <div class="modal-footer">
+        <span class="indicator x-indicator"><i class="icon-spinner icon-spin"></i></span>
         <button class="btn" data-dismiss="modal">cancel</button>
         <button class="btn btn-danger x-confirm-delete">delete</button>
     </div>

src/UI/Series/Delete/DeleteSeriesView.js

@@ -13,12 +13,14 @@ define(
             },
 
             ui: {
-                deleteFiles: '.x-delete-files'
+                deleteFiles : '.x-delete-files',
+                indicator   : '.x-indicator'
             },
 
             removeSeries: function () {
                 var self = this;
                 var deleteFiles = this.ui.deleteFiles.prop('checked');
+                this.ui.indicator.show();
 
                 this.model.destroy({
                     data: { 'deleteFiles': deleteFiles },