edit

src/Database.php

@@ -747,7 +747,7 @@ class Database
             if (isset($config['manage']['list'][0]) && is_array($config['manage']['list'][0])) {
                 $config['manage']['_list']['value'] += $config['manage']['list'][0];
                 unset($config['manage']['list'][0]);
-            } elseif (isset($config['manage']['list_button'])) {
+            } elseif (isset($config['manage']['list_button']) && $config['manage']['list_button']) {
                 $config['manage']['_list']['value'] += $config['manage']['list_button'];
             }