message: Fix parsing issue in event tile preview for appearance tab
  Fixes
diff: @@ -80,27 +80,28 @@ export default class EventTilePreview extends React.Component<IProps, IState> {
  private fakeEvent({userId, displayname, avatar_url: avatarUrl}: IState) {
  // Fake it till we make it
  - const event = new MatrixEvent(JSON.parse(`{
  - "type": "m.room.message",
  - "sender": "${userId}",
  - "content": {
  + const rawEvent = {
  + type: "m.room.message",
  + sender: userId,
  + content: {
  "m.new_content": {
  - "msgtype": "m.text",
  - "body": "${this.props.message}",
  - "displayname": "${displayname}",
  - "avatar_url": "${avatarUrl}"
  + msgtype: "m.text",
  + body: this.props.message,
  + displayname: displayname,
  + avatar_url: avatarUrl,
  },
  - "msgtype": "m.text",
  - "body": "${this.props.message}",
  - "displayname": "${displayname}",
  - "avatar_url": "${avatarUrl}"
  + msgtype: "m.text",
  + body: this.props.message,
  + displayname: displayname,
  + avatar_url: avatarUrl,
  },
  - "unsigned": {
  - "age": 97
  + unsigned: {
  + age: 97,
  },
  - "event_id": "$9999999999999999999999999999999999999999999",
  - "room_id": "!999999999999999999:matrix.org"
  - }`));
  + event_id: "$9999999999999999999999999999999999999999999",
  + room_id: "!999999999999999999:example.org",
  + };
  + const event = new MatrixEvent(rawEvent);
  // Fake it more
  event.sender = {
  