N°8771 - Add Symfony form component to iTop core (#760)

- Add Symfony Form Component
- Add Symfony CSRF security component
- Add iTop default form template
- Add Twig debug extension to Twig Environment
- Add iTop abstract controller facility to get form builder
- Add Twig filter to make trans an alias of dict_s filter

lib/symfony/form/SubmitButton.php

@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Form;
+
+/**
+ * A button that submits the form.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class SubmitButton extends Button implements ClickableInterface
+{
+    private bool $clicked = false;
+
+    public function isClicked(): bool
+    {
+        return $this->clicked;
+    }
+
+    /**
+     * Submits data to the button.
+     *
+     * @return $this
+     *
+     * @throws Exception\AlreadySubmittedException if the form has already been submitted
+     */
+    public function submit(array|string|null $submittedData, bool $clearMissing = true): static
+    {
+        if ($this->getConfig()->getDisabled()) {
+            $this->clicked = false;
+
+            return $this;
+        }
+
+        parent::submit($submittedData, $clearMissing);
+
+        $this->clicked = null !== $submittedData;
+
+        return $this;
+    }
+}