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/javascript/mastodon/features/ui/components/modal_root.js

@@ -19,7 +19,8 @@ import {
   EmbedModal,
   ListEditor,
   ListAdder,
-} from '../../../features/ui/util/async-components';
+  CompareHistoryModal,
+} from 'mastodon/features/ui/util/async-components';
 
 const MODAL_COMPONENTS = {
   'MEDIA': () => Promise.resolve({ default: MediaModal }),
@@ -34,7 +35,8 @@ const MODAL_COMPONENTS = {
   'EMBED': EmbedModal,
   'LIST_EDITOR': ListEditor,
   'FOCAL_POINT': () => Promise.resolve({ default: FocalPointModal }),
-  'LIST_ADDER':ListAdder,
+  'LIST_ADDER': ListAdder,
+  'COMPARE_HISTORY': CompareHistoryModal,
 };
 
 export default class ModalRoot extends React.PureComponent {