allow to include bundle configuration in system configuration screen (#1235)

src/Plugin/AbstractPluginExtension.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Plugin;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+abstract class AbstractPluginExtension extends Extension
+{
+    protected function registerBundleConfiguration(ContainerBuilder $container, array $configs)
+    {
+        $bundleConfig = [$this->getAlias() => $configs];
+
+        if ($container->hasParameter('kimai.bundles.config')) {
+            $bundleConfig = array_merge(
+                $container->getParameter('kimai.bundles.config'),
+                $bundleConfig
+            );
+        }
+
+        $container->setParameter('kimai.bundles.config', $bundleConfig);
+    }
+}