Issue #3459948: [1.0.1] DSFR 1.11 remove class fr-mb-4v wrapping mega menu

Closes #3459948

templates/patterns/nav_menu/pattern-nav-menu.html.twig

@@ -74,7 +74,7 @@
         <button class="fr-btn fr-btn--close" aria-controls="{{ index }}" title="{{ 'Close'|t }}">{{ 'Close'|t }}</button>
         <div class="fr-grid-row fr-grid-row-lg--gutters">
           {% if parent.content and parent.content.extra_title %}
-            <div class="fr-col-12 fr-col-lg-8 fr-col-offset-lg-4--right fr-mb-4v">
+            <div class="fr-col-12 fr-col-lg-8 fr-col-offset-lg-4--right">
               <div class="fr-mega-menu__leader">
                 <h4 class="fr-h4 fr-mb-2v">{{ parent.content.extra_title }}</h4>
                 {% if parent.content.extra_description %}