Enable dynamic form elements

Expire time of the AcknowledgeForm and hours as well as
minutes of the ScheduleDowntimeForm are now dynamic.

refs #4439

library/Icinga/Web/Form.php

@@ -365,12 +365,10 @@ abstract class Form extends Zend_Form
         if ($this->getElement($this->tokenElementName) === null) {
             return false;
         }
-
         if (strpos($elementValue, '|') === false) {
             return false;
         }
 
-
         list($seed, $token) = explode('|', $elementValue);
 
         if (!is_numeric($seed)) {

modules/monitoring/application/forms/Command/AcknowledgeForm.php

@@ -39,6 +39,14 @@ use Icinga\Protocol\Commandpipe\Comment;
  */
 class AcknowledgeForm extends CommandForm
 {
+    /**
+     * Initialize form
+     */
+    public function init()
+    {
+        $this->setName('AcknowledgeForm');
+    }
+
     /**
      * Interface method to build the form
      * @see CommandForm::create

modules/monitoring/application/forms/Command/ScheduleDowntimeForm.php

@@ -58,6 +58,14 @@ class ScheduleDowntimeForm extends WithChildrenCommandForm
      */
     const TYPE_FLEXIBLE = 'flexible';
 
+    /**
+     * Initialize form
+     */
+    public function init()
+    {
+        $this->setName('ScheduleDowntimeForm');
+    }
+
     /**
      * Build an array of timestamps
      *