Add Japanese translations for #3243 (#4192)

app/javascript/mastodon/locales/ja.json

@@ -109,6 +109,8 @@
   "notifications.column_settings.favourite": "お気に入り",
   "notifications.column_settings.follow": "新しいフォロワー",
   "notifications.column_settings.mention": "返信",
+  "notifications.column_settings.push": "プッシュ通知",
+  "notifications.column_settings.push_meta": "このデバイス",
   "notifications.column_settings.reblog": "ブースト",
   "notifications.column_settings.show": "カラムに表示",
   "notifications.column_settings.sound": "通知音を再生",
@@ -147,6 +149,7 @@
   "report.target": "問題のユーザー",
   "search.placeholder": "検索",
   "search_results.total": "{count, number}件の結果",
+  "standalone.public_title": "A look inside...",
   "status.cannot_reblog": "この投稿はブーストできません",
   "status.delete": "削除",
   "status.favourite": "お気に入り",