Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
	app/views/layouts/application.html.haml

Edited:
        app/helpers/application_helper.rb
        app/views/admin/domain_blocks/new.html.haml

Conflict wasn't really one, just two changes too close to one another.
Edition was to adapt the class names for themes to class names for
skins and flavours.

Also edited app/views/admin/domain_blocks/new.html.haml to strip the
duplicate admin pack inclusion thing.

app/javascript/mastodon/locales/ja.json

@@ -166,9 +166,10 @@
   "missing_indicator.label": "見つかりません",
   "missing_indicator.sublabel": "見つかりませんでした",
   "mute_modal.hide_notifications": "このユーザーからの通知を隠しますか？",
-  "navigation_bar.apps": "Mobile apps",
+  "navigation_bar.apps": "アプリ",
   "navigation_bar.blocks": "ブロックしたユーザー",
   "navigation_bar.community_timeline": "ローカルタイムライン",
+  "navigation_bar.compose": "Compose new toot",
   "navigation_bar.direct": "ダイレクトメッセージ",
   "navigation_bar.discover": "見つける",
   "navigation_bar.domain_blocks": "非表示にしたドメイン",
@@ -263,6 +264,7 @@
   "status.cancel_reblog_private": "ブースト解除",
   "status.cannot_reblog": "この投稿はブーストできません",
   "status.delete": "削除",
+  "status.detailed_status": "Detailed conversation view",
   "status.direct": "@{name}さんにダイレクトメッセージ",
   "status.embed": "埋め込み",
   "status.favourite": "お気に入り",