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

Conflicts:
- .eslintrc.yml
  Removed, as upstream removed it.
- app/controllers/admin/statuses_controller.rb
  Minor code cleanup when porting one of our features.
- app/models/account.rb
  Note length validation has changed upstream.
  We now use upstream's validation (dropped legacy glitch-soc
  account metadata stuff) but with configurable limit.
- app/services/post_status_service.rb
  Upstream has added support for scheduled toots, refactoring
  the code a bit. Adapted our changes to this refactoring.
- app/views/stream_entries/_detailed_status.html.haml
  Not a real conflict, changes too close.
- app/views/stream_entries/_simple_status.html.haml
  Not a real conflict, changes too close.

app/javascript/mastodon/locales/ja.json

@@ -297,6 +297,8 @@
   "search_results.statuses": "トゥート",
   "search_results.total": "{count, number}件の結果",
   "standalone.public_title": "今こんな話をしています...",
+  "status.admin_account": "Open moderation interface for @{name}",
+  "status.admin_status": "Open this status in the moderation interface",
   "status.block": "@{name}さんをブロック",
   "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",