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/styles/mastodon/admin.scss

@@ -151,6 +151,20 @@ $no-columns-breakpoint: 600px;
       font-weight: 500;
     }
 
+    .directory__tag a {
+      box-shadow: none;
+    }
+
+    .directory__tag h4 {
+      font-size: 18px;
+      font-weight: 700;
+      color: $primary-text-color;
+      text-transform: none;
+      padding-bottom: 0;
+      margin-bottom: 0;
+      border-bottom: none;
+    }
+
     & > p {
       font-size: 14px;
       line-height: 18px;