added hourly and money budgets to activity, project and customer (#843)

src/Validator/Constraints/DurationValidator.php

@@ -0,0 +1,16 @@
+<?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\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraints\RegexValidator;
+
+class DurationValidator extends RegexValidator
+{
+}