diff --git a/core/lib/Drupal.php b/core/lib/Drupal.php
index b301cd9..4d3ea4e 100644
--- a/core/lib/Drupal.php
+++ b/core/lib/Drupal.php
@@ -81,7 +81,7 @@ class Drupal {
   /**
    * The current system version.
    */
-  const VERSION = '8.4.0-dev';
+  const VERSION = '8.3.0-dev';
 
   /**
    * Core API compatibility.
diff --git a/core/lib/Drupal/Core/Updater/Theme.php b/core/lib/Drupal/Core/Updater/Theme.php
index 48f68c7..6ef9905 100644
--- a/core/lib/Drupal/Core/Updater/Theme.php
+++ b/core/lib/Drupal/Core/Updater/Theme.php
@@ -3,12 +3,14 @@
 namespace Drupal\Core\Updater;
 
 use Drupal\Core\Url;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Defines a class for updating themes using
  * Drupal\Core\FileTransfer\FileTransfer classes via authorize.php.
  */
 class Theme extends Updater implements UpdaterInterface {
+    use StringTranslationTrait;
 
   /**
    * Returns the directory where a theme should be installed.
@@ -87,7 +89,7 @@ public function postInstall() {
    * {@inheritdoc}
    */
   public function postInstallTasks() {
-    // Since this is being called outsite of the primary front controller,
+    // Since this is being called outside of the primary front controller,
     // the base_url needs to be set explicitly to ensure that links are
     // relative to the site root.
     // @todo Simplify with https://www.drupal.org/node/2548095
@@ -98,14 +100,28 @@ public function postInstallTasks() {
         'base_url' => $GLOBALS['base_url'],
       ],
     ];
+
+    $url = Url::fromRoute('system.themes_page');
+    $link_options = [
+      'attributes' => [
+        'class' => [
+          'button',
+        ],
+      ],
+    ];
+
     return [
       $default_options + [
-        '#url' => Url::fromRoute('system.themes_page'),
-        '#title' => t('Install newly added themes'),
+        '#url' => $url->setOptions($link_options),
+        '#title' => $this->t('Enable theme'),
+      ],
+      $default_options + [
+        '#url' => Url::fromRoute('update.theme_install'),
+        '#title' => $this->t('Install another theme'),
       ],
       $default_options + [
         '#url' => Url::fromRoute('system.admin'),
-        '#title' => t('Administration pages'),
+        '#title' => $this->t('Administration pages'),
       ],
     ];
   }