javascript and api to stop and display active records (#772)

src/Configuration/StringAccessibleConfigTrait.php

@@ -59,7 +59,7 @@ trait StringAccessibleConfigTrait
                 $temp = array_slice($temp, 1);
             }
             foreach ($temp as $key2) {
-                if (!isset($array[$key2])) {
+                if (!array_key_exists($key2, $array)) {
                     // unknown values will silently be skipped
                     continue 2;
                 }
@@ -110,7 +110,7 @@ trait StringAccessibleConfigTrait
         $keys = explode('.', $key);
         $search = array_shift($keys);
 
-        if (!isset($config[$search])) {
+        if (!array_key_exists($search, $config)) {
             throw new \InvalidArgumentException('Unknown config: ' . $key);
         }
 

src/Configuration/ThemeConfiguration.php

@@ -0,0 +1,25 @@
+<?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\Configuration;
+
+class ThemeConfiguration implements SystemBundleConfiguration
+{
+    use StringAccessibleConfigTrait;
+
+    public function getPrefix(): string
+    {
+        return 'theme';
+    }
+
+    public function getSelectPicker(): string
+    {
+        return (string) $this->find('select_type');
+    }
+}