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/actions/history.js

@@ -0,0 +1,37 @@
+import api from '../api';
+import { importFetchedAccounts } from './importer';
+
+export const HISTORY_FETCH_REQUEST = 'HISTORY_FETCH_REQUEST';
+export const HISTORY_FETCH_SUCCESS = 'HISTORY_FETCH_SUCCESS';
+export const HISTORY_FETCH_FAIL    = 'HISTORY_FETCH_FAIL';
+
+export const fetchHistory = statusId => (dispatch, getState) => {
+  const loading = getState().getIn(['history', statusId, 'loading']);
+
+  if (loading) {
+    return;
+  }
+
+  dispatch(fetchHistoryRequest(statusId));
+
+  api(getState).get(`/api/v1/statuses/${statusId}/history`).then(({ data }) => {
+    dispatch(importFetchedAccounts(data.map(x => x.account)));
+    dispatch(fetchHistorySuccess(statusId, data));
+  }).catch(error => dispatch(fetchHistoryFail(error)));
+};
+
+export const fetchHistoryRequest = statusId => ({
+  type: HISTORY_FETCH_REQUEST,
+  statusId,
+});
+
+export const fetchHistorySuccess = (statusId, history) => ({
+  type: HISTORY_FETCH_SUCCESS,
+  statusId,
+  history,
+});
+
+export const fetchHistoryFail = error => ({
+  type: HISTORY_FETCH_FAIL,
+  error,
+});