Improve form for selecting media display preference (#8965)

Regression from #8569

app/views/settings/preferences/show.html.haml

@@ -36,9 +36,11 @@
 
   %hr#settings_web/
 
-  - if Themes.instance.names.size > 1
-    .fields-group
-      = f.input :setting_theme, collection: Themes.instance.names, label_method: lambda { |theme| I18n.t("themes.#{theme}", default: theme) }, wrapper: :with_block_label, include_blank: false
+  .fields-row
+    .fields-group.fields-row__column.fields-row__column-6
+      = f.input :setting_theme, collection: Themes.instance.names, label_method: lambda { |theme| I18n.t("themes.#{theme}", default: theme) }, wrapper: :with_label, include_blank: false, hint: false
+    .fields-group.fields-row__column.fields-row__column-6
+      = f.input :setting_display_media, collection: ['default', 'show_all', 'hide_all'], wrapper: :with_label, include_blank: false, label_method: lambda { |item| t("simple_form.hints.defaults.setting_display_media_#{item}") }, hint: false
 
   .fields-group
     = f.input :setting_unfollow_modal, as: :boolean, wrapper: :with_label
@@ -47,7 +49,6 @@
 
   .fields-group
     = f.input :setting_auto_play_gif, as: :boolean, wrapper: :with_label
-    = f.input :setting_display_media, collection: ['default', 'show_all', 'hide_all'], wrapper: :with_label, include_blank: false, label_method: lambda { |item| safe_join([t("simple_form.labels.defaults.setting_display_media_#{item}"), content_tag(:span, t("simple_form.hints.defaults.setting_display_media_#{item}"), class: 'hint')]) }, required: false, as: :radio_buttons, collection_wrapper_tag: 'ul', item_wrapper_tag: 'li'
     = f.input :setting_expand_spoilers, as: :boolean, wrapper: :with_label
     = f.input :setting_reduce_motion, as: :boolean, wrapper: :with_label
     = f.input :setting_system_font_ui, as: :boolean, wrapper: :with_label