Add edit history to web UI (#17390)

* Add edit history to web UI

* Change history reducer to store items per status

* Fix missing loading prop

app/serializers/rest/status_edit_serializer.rb

@@ -1,6 +1,14 @@
 # frozen_string_literal: true
 
 class REST::StatusEditSerializer < ActiveModel::Serializer
-  attributes :text, :spoiler_text, :media_attachments_changed,
-             :created_at
+  has_one :account, serializer: REST::AccountSerializer
+
+  attributes :content, :spoiler_text,
+             :media_attachments_changed, :created_at
+
+  has_many :emojis, serializer: REST::CustomEmojiSerializer
+
+  def content
+    Formatter.instance.format(object)
+  end
 end