add cleanup of html string extracted from grapesjs content

src/core/Twig/Extension/GrapesJsExtension.php

@@ -25,6 +25,8 @@ class GrapesJsExtension extends AbstractExtension
     {
         $html = $this->extractData($value, 'html');
 
+        $html = str_replace($this->getHtmlStringsToRemove(), '', $html);
+
         return preg_replace('#</?body[^>]*>#', '', $html);
     }
 
@@ -39,4 +41,11 @@ class GrapesJsExtension extends AbstractExtension
 
         return $data[$key] ?? '';
     }
+
+    protected function getHtmlStringsToRemove(): array
+    {
+        return [
+            'draggable="true"',
+        ];
+    }
 }