Merge branch 'feature/ISTWCMS-3754-tstruyk-fix-mailman' into '8.x-3.x'

ISTWCMS-3754: Fix form and email subscription

See merge request !1

source/_patterns/04-components/mailman-subscription/mailman-subscription.twig

-<div id="uw-mailmain-{{ uniqueid }}" class="uw-mailman">
+<div id="uw-mailman-{{ uniqueid }}" class="uw-mailman">
   <form action="//{{ mailman.server }}/mailman/subscribe/{{ mailman.servername }}">
-    <div class="uw-mailmain__label">
-      <label for="uw-mailmain__input-{{ mailman.uniqueid }}" class="uw-mailman__label--email">Email address:</label>
+    <div class="uw-mailman__label">
+      <label for="uw-mailman__input-{{ mailman.uniqueid }}" class="uw-mailman__label--email">Email address:</label>
     </div>
-    <div class="uw-mailmain__email">
+    <div class="uw-mailman__email">
       {% include '@base/02-html-elements/27-input/input.twig' with {
         'type': 'email',
-        'name': 'uw-mailmain-email',
-        'id': 'uw-mailmain__input-' ~ mailman.uniqueid
+        'name': 'email',
+        'id': 'uw-mailman__input-' ~ mailman.uniqueid
       } %}
       {% include '@base/02-html-elements/27-input/input--submit.twig' with {
         'type': 'submit',
@@ -15,4 +15,4 @@
       } %}
     </div>
   </form>
-</div>
\ No newline at end of file
+</div>