use specific volto alpha version for testing

Jenkinsfile

@@ -6,7 +6,7 @@ pipeline {
         NAMESPACE = "@eeacms"
         SONARQUBE_TAGS = "volto.eea.europa.eu,forest.eea.europa.eu"
         DEPENDENCIES = ""
-        VOLTO = "alpha"
+        VOLTO = "16.0.0-alpha.14"
     }
 
   stages {

src/customizations/volto/components/manage/Blocks/Block/StyleWrapper.jsx

@@ -0,0 +1,22 @@
+import React from 'react';
+import cx from 'classnames';
+import { buildStyleClassNamesFromData } from '@plone/volto/helpers';
+
+const StyleWrapper = (props) => {
+  const { children, data = {} } = props;
+  const styles = buildStyleClassNamesFromData(data.styles);
+  const rewrittenChildren = React.Children.map(children, (child) => {
+    if (React.isValidElement(child)) {
+      const childProps = {
+        ...props,
+        className: cx([child.props.className, ...styles]),
+      };
+      return React.cloneElement(child, childProps);
+    }
+    return child;
+  });
+
+  return rewrittenChildren;
+};
+
+export default StyleWrapper;