message: use originalEvent if present and append it to list
diff: @@ -30,6 +30,7 @@ export default class MessageEditHistoryDialog extends React.PureComponent {
  constructor(props) {
  super(props);
  this.state = {
  + originalEvent: null,
  error: null,
  events: [],
  nextBatch: null,
  @@ -66,6 +67,7 @@ export default class MessageEditHistoryDialog extends React.PureComponent {
  const newEvents = result.events;
  this._locallyRedactEventsIfNeeded(newEvents);
  this.setState({
  + originalEvent: this.state.originalEvent || result.originalEvent,
  events: this.state.events.concat(newEvents),
  nextBatch: result.nextBatch,
  isLoading: false,
  @@ -100,7 +102,12 @@ export default class MessageEditHistoryDialog extends React.PureComponent {
  const DateSeparator = sdk.getComponent('messages.DateSeparator');
  const nodes = [];
  let lastEvent;
  - this.state.events.forEach(e => {
  + let allEvents = this.state.events;
  + // append original event when we've done last pagination
  + if (this.state.originalEvent && !this.state.nextBatch) {
  + allEvents = allEvents.concat(this.state.originalEvent);
  + }
  + allEvents.forEach(e => {
  if (!lastEvent || wantsDateSeparator(lastEvent.getDate(), e.getDate())) {
  nodes.push(<li key={e.getTs() + "~"}><DateSeparator ts={e.getTs()} /></li>);
  }
  