ENGCOM-3268: Added form fieldset before html data to \Magento\Framework\Data\Form\Element\Fieldset in getElementHtml() method #18798

 - Merge Pull Request #18798 from vasilii-b/magento2:2.3-issue-2618
 - Merged commits:
   1. 069195c

Author: magento-engcom-team

lib/internal/Magento/Framework/Data/Form/Element/Fieldset.php

@@ -43,7 +43,8 @@ public function __construct(
      */
     public function getElementHtml()
     {
-        $html = '<fieldset id="' . $this->getHtmlId() . '"' . $this->serialize(
+        $html = $this->getBeforeElementHtml();
+        $html .= '<fieldset area-hidden="false" id="' . $this->getHtmlId() . '"' . $this->serialize(
             ['class']
         ) . $this->_getUiId() . '>' . "\n";
         if ($this->getLegend()) {