message: get decrypted content if needed
diff: @@ -37,7 +37,8 @@ export default class EditHistoryMessage extends React.PureComponent {
  render() {
  const {mxEvent} = this.props;
  - const content = mxEvent.event.content["m.new_content"] || mxEvent.event.content;
  + const originalContent = mxEvent.getOriginalContent();
  + const content = originalContent["m.new_content"] || originalContent;
  const contentElements = HtmlUtils.bodyToHtml(content);
  let contentContainer;
  if (mxEvent.getContent().msgtype === "m.emote") {
  