webui: fix restore job form element population

This commit fixes the issue that the form field "restore job" is not
populated correctly after client selection and stays disabled if the
configured restore job number is greater than 1 due to a wrong
comparison-operator.

Fixes #1206: form field restore job is not populated after client selection

(cherry picked from commit e7dbde2)

webui/module/Restore/src/Restore/Form/RestoreForm.php

@@ -244,7 +244,7 @@ public function __construct($restore_params=null, $clients=null, $filesets=null,
          ));
       }
       else {
-         if(!empty($this->restore_params['client']) && count($this->getRestoreJobList()) == 1) {
+         if(!empty($this->restore_params['client']) && count($this->getRestoreJobList()) > 0) {
             $this->add(array(
                'name' => 'restorejob',
                'type' => 'select',