[TASK] Checking for empty template selection

Classes/Controller/QueueController.php

@@ -52,11 +52,10 @@ class QueueController extends ActionController {
 	public function indexAction($selectedTemplate = NULL, $selectedExtension = NULL) {
 		$registerArray = MailTemplateService::getRegisterArray();
 
-		if ($selectedTemplate === NULL) {
+		if ($selectedTemplate === NULL || $selectedTemplate == '') {
 			$selectedExtension = key($registerArray);
 			$selectedTemplate = key($registerArray[$selectedExtension]);
 		}
-
 		$queue = $this->mailRepository->findAllEntries($selectedExtension, $selectedTemplate);
 
 		$this->view->assign('selectedTemplateKey', $selectedTemplate);