Fixed a spurious iframe load

Duplicati/Server/webroot/ngax/scripts/controllers/ExportController.js

@@ -30,6 +30,7 @@ backupApp.controller('ExportController', function($scope, $routeParams, AppServi
             );
         } else {
             $scope.DownloadURL = AppService.get_export_url($scope.BackupID, $scope.Passphrase);
+            document.getElementById('export-download-iframe').src = $scope.DownloadURL;
             $scope.Completed = true;
         }
 

Duplicati/Server/webroot/ngax/templates/export.html

@@ -52,5 +52,5 @@
 
     </form>
 
-    <iframe style="display:none" src="{{DownloadURL}}"></iframe>
+    <iframe style="display:none" id="export-download-iframe"></iframe>
 </div>