Add support for editing for published statuses (#16697)

* Add support for editing for published statuses

* Fix references to stripped-out code

* Various fixes and improvements

* Further fixes and improvements

* Fix updates being potentially sent to unauthorized recipients

* Various fixes and improvements

* Fix wrong words in test

* Fix notifying accounts that were tagged but were not in the audience

* Fix mistake

spec/workers/activitypub/distribution_worker_spec.rb

@@ -35,13 +35,16 @@ describe ActivityPub::DistributionWorker do
     end
 
     context 'with direct status' do
+      let(:mentioned_account) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://foo.bar/inbox')}
+
       before do
         status.update(visibility: :direct)
+        status.mentions.create!(account: mentioned_account)
       end
 
-      it 'does nothing' do
+      it 'delivers to mentioned accounts' do
         subject.perform(status.id)
-        expect(ActivityPub::DeliveryWorker).to_not have_received(:push_bulk)
+        expect(ActivityPub::DeliveryWorker).to have_received(:push_bulk).with(['https://foo.bar/inbox'])
       end
     end
   end