Merge branch 'feature_1643_fix_template_filter_pagination' into 'master'

[BUGFIX] 1643 MailQueue: Fix template filter pagination

See merge request !27

Classes/Controller/QueueController.php

@@ -228,7 +228,13 @@ class QueueController extends ActionController {
 			$this->session->setDataByKey('mode', $this->request->getArgument('controller'));
 		}
 
-		$filterTemplate = $_POST['filterTemplate'];
+		// save the Template filter to the session
+		if (!isset($_SESSION[$this->session->getSessionKey()]['filterTemplate'])
+			|| (isset($_POST['filterTemplate']) && $this->session->getDataByKey('filterTemplate') !== $_POST['filterTemplate'])) {
+			$this->session->setDataByKey('filterTemplate', $_POST['filterTemplate']);
+		}
+
+		$filterTemplate = $this->session->getDataByKey('filterTemplate') ?? $_POST['filterTemplate'];
 		$filters['filterExtension'] = $filterTemplate;
 		$filters['filterTemplate'] = $filterTemplate;