improved dark mode, automatic theme switch (#5720)

src/Form/MultiUpdate/MultiUpdateTable.php

@@ -60,7 +60,7 @@ final class MultiUpdateTable extends AbstractType
                 'label' => $key,
                 'attr' => [
                     'data-href' => $value,
-                    'class' => 'multi_update_table_action' . (stripos($key, 'delete') !== false ? ' btn-danger' : ''),
+                    'class' => 'multi_update_table_action' . (stripos($key, 'delete') !== false ? ' btn-danger' : ' btn-primary'),
                 ],
             ]);
         }

src/Form/Type/SkinType.php

@@ -18,18 +18,17 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
  */
 final class SkinType extends AbstractType
 {
-    public const THEMES = [
-        'skin.light' => 'default',
-        'skin.dark' => 'dark',
-    ];
-
     public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
             'label' => 'skin',
             'search' => false,
             'required' => true,
-            'choices' => self::THEMES,
+            'choices' => [
+                'automatic' => 'auto',
+                'skin.light' => 'default',
+                'skin.dark' => 'dark',
+            ],
         ]);
     }