add support banner container

Author: Arhell

includes/support.html

@@ -1,6 +1,6 @@
 <!-- Contact support banner -->
 <section class="mt-lg-9 py-7 no-print js-support-banner" style="background-color: #fafbfc;">
-  <div class="mx-4">
+  <div class="container-xl px-3 px-md-6 ">
     <h4 class="mb-2">
       {% data ui.support.still_need_help %}
     </h4>