Header: Adapt authentication config dialog

application/views/scripts/config/authentication/create.phtml

@@ -2,7 +2,7 @@
     <?= $this->tabs->showOnlyCloseButton() ?>
 </div>
 <div class="content">
-    <h1 tabindex="0" id="authentication-create">
+    <h1 tabindex="-1" id="authentication-create">
         <?= $this->translate('Create New Authentication Backend'); ?>
     </h1>
     <p>

application/views/scripts/config/authentication/modify.phtml

@@ -2,7 +2,7 @@
     <?= $this->tabs->showOnlyCloseButton() ?>
 </div>
 <div class="content">
-    <h1 tabindex="0" id="authentication-modify">
+    <h1 tabindex="-1" id="authentication-modify">
         <?= $this->translate('Edit Backend'); ?>
     </h1>
     <div>

application/views/scripts/config/authentication/remove.phtml

@@ -2,7 +2,7 @@
     <?= $this->tabs->showOnlyCloseButton() ?>
 </div>
 <div class="content">
-    <h1 tabindex="0" id="authentication-remove">
+    <h1 tabindex="-1" id="authentication-remove">
         <?= $this->translate('Remove Backend'); ?>
     </h1>
     <div>

application/views/scripts/config/authentication/reorder.phtml

@@ -2,21 +2,20 @@
   <?= $tabs; ?>
 </div>
 <div class="content" data-base-target="_next">
-  <h1 tabindex="0" id="authentication-reorder">
+  <h1 tabindex="-1" id="authentication-reorder">
-    <?= t('Authentication Configuration'); ?>
+    <?= $this->translate('Authentication Configuration'); ?>
   </h1>
   <div class="skip-links skip-links-inline">
-    <nav>
+    <h3 class="sr-only"><?= $this->translate('Skip Links'); ?></h3>
-      <ul>
+    <ul>
-        <li>
+      <li>
-          <a tabindex="0" href="#authentication-reorder-form">
+        <a tabindex="0" href="#authentication-reorder-form">
-            <?= t('Skip To Authentication Reorder Form'); ?>
+          <?= t('Skip To Authentication Reorder Form'); ?>
-          </a>
+        </a>
-        </li>
+      </li>
-      </ul>
+    </ul>
-    </nav>
   </div>
-  <h2 tabindex="0" id="authentication-new-backend" class="sr-only">
+  <h2 tabindex="-1" id="authentication-new-backend" class="sr-only">
     <?= t('New Authentication Backend'); ?>
   </h2>
   <p>
@@ -24,7 +23,7 @@
       <?= $this->icon('plus', null, array('aria-hidden' => 'true')); ?><?= $this->translate('Create A New Authentication Backend'); ?>
     </a>
   </p>
-  <h2 tabindex="0" id="authentication-reorder" class="sr-only">
+  <h2 tabindex="-1" id="authentication-reorder" class="sr-only">
     <?= t('Reorder Authentication Backends'); ?>
   </h2>
   <div id="authentication-reorder-form">