Merge commit '0ad2413b35287958f59073a5b63aecc659a64d98' into glitch-soc/merge-upstream

Conflicts:
- `app/javascript/styles/mastodon/forms.scss`:
  Conflict because we ran eslint autofix on upstream files.
- `config/initializers/content_security_policy.rb`:
  Code style changes but we have a different version.
  Kept our version.
- `streaming/index.js`:
  Upstream fixed a typo close to glitch-soc-only code.
  Applied upstream's changes.

config/initializers/paperclip.rb

@@ -7,7 +7,7 @@ Paperclip.interpolates :filename do |attachment, style|
   if style == :original
     attachment.original_filename
   else
-    [basename(attachment, style), extension(attachment, style)].delete_if(&:blank?).join('.')
+    [basename(attachment, style), extension(attachment, style)].compact_blank!.join('.')
   end
 end