Merge commit '55e7c08a83547424024bac311d5459cb82cf6dae' into glitch-soc/merge-upstream

Conflicts:
- `app/models/user_settings.rb`:
  Upstream added a constraint on a setting textually close
  to glitch-soc-only settings.
  Applied upstream's change.
- `lib/sanitize_ext/sanitize_config.rb`:
  Upstream added support for the `translate` attribute on a few elements,
  where glitch-soc had a different set of allowed elements and attributes.
  Extended glitch-soc's allowed attributes with `translate` as upstream did.
- `spec/validators/status_length_validator_spec.rb`:
  Upstream refactored to use RSpec's `instance_double` instead of `double`,
  but glitch-soc had changes to tests due to configurable max toot chars.
  Applied upstream's changes while keeping tests against configurable max
  toot chars.

spec/lib/activitypub/activity/add_spec.rb

@@ -26,7 +26,7 @@ RSpec.describe ActivityPub::Activity::Add do
     end
 
     context 'when status was not known before' do
-      let(:service_stub) { double }
+      let(:service_stub) { instance_double(ActivityPub::FetchRemoteStatusService) }
 
       let(:json) do
         {

spec/lib/activitypub/activity/move_spec.rb

@@ -26,7 +26,7 @@ RSpec.describe ActivityPub::Activity::Move do
     stub_request(:post, old_account.inbox_url).to_return(status: 200)
     stub_request(:post, new_account.inbox_url).to_return(status: 200)
 
-    service_stub = double
+    service_stub = instance_double(ActivityPub::FetchRemoteAccountService)
     allow(ActivityPub::FetchRemoteAccountService).to receive(:new).and_return(service_stub)
     allow(service_stub).to receive(:call).and_return(returned_account)
   end