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

Conflicts:
- `app/controllers/activitypub/collections_controller.rb`:
  Conflict due to glitch-soc having to take care of local-only
  pinned toots in that controller.
  Took upstream's changes and restored the local-only special
  handling.
- `app/controllers/auth/sessions_controller.rb`:
  Minor conflicts due to the theming system, applied upstream
  changes, adapted the following two files for glitch-soc's
  theming system:
  - `app/controllers/concerns/sign_in_token_authentication_concern.rb`
  - `app/controllers/concerns/two_factor_authentication_concern.rb`
- `app/services/backup_service.rb`:
  Minor conflict due to glitch-soc having to handle local-only
  toots specially. Applied upstream changes and restored
  the local-only special handling.
- `app/views/admin/custom_emojis/index.html.haml`:
  Minor conflict due to the theming system.
- `package.json`:
  Upstream dependency updated, too close to a glitch-soc-only
  dependency in the file.
- `yarn.lock`:
  Upstream dependency updated, too close to a glitch-soc-only
  dependency in the file.

app/lib/feed_manager.rb

@@ -287,9 +287,14 @@ class FeedManager
     combined_regex = active_filters.reduce { |memo, obj| Regexp.union(memo, obj) }
     status         = status.reblog if status.reblog?
 
-    !combined_regex.match(Formatter.instance.plaintext(status)).nil? ||
-      (status.spoiler_text.present? && !combined_regex.match(status.spoiler_text).nil?) ||
-      (status.preloadable_poll && !combined_regex.match(status.preloadable_poll.options.join("\n\n")).nil?)
+    combined_text = [
+      Formatter.instance.plaintext(status),
+      status.spoiler_text,
+      status.preloadable_poll ? status.preloadable_poll.options.join("\n\n") : nil,
+      status.media_attachments.map(&:description).join("\n\n"),
+    ].compact.join("\n\n")
+
+    !combined_regex.match(combined_text).nil?
   end
 
   # Adds a status to an account's feed, returning true if a status was