enhance wompum grid layout; add aspect ratio support and improve height management

layouts/partials/header.html

@@ -15,8 +15,8 @@
       </ul>
     </nav>
   </div>
-  <div class="wompum-container wompum-container--wide-gap px-4">
-    <div class="wompum-grid h-1"
+  <div class="wompum-container wompum-container--wide-gap px-4 h-1">
+    <div class="wompum-grid"
          data-text="{{ .Site.Title }}"
          data-columns="7"
          data-rows="1">