message: Use componentWillReceiveProps
diff: @@ -63,16 +63,15 @@ const Pill = React.createClass({
  };
  },
  - componentWillMount() {
  - this._unmounted = false;
  + componentWillReceiveProps(nextProps) {
  let regex = REGEX_MATRIXTO;
  - if (this.props.inMessage) {
  + if (nextProps.inMessage) {
  regex = REGEX_LOCAL_MATRIXTO;
  }
  // Default to the empty array if no match for simplicity
  // resource and prefix will be undefined instead of throwing
  - const matrixToMatch = regex.exec(this.props.url) || [];
  + const matrixToMatch = regex.exec(nextProps.url) || [];
  const resourceId = matrixToMatch[1]; // The room/user ID
  const prefix = matrixToMatch[2]; // The first character of prefix
  @@ -87,7 +86,7 @@ const Pill = React.createClass({
  let room;
  switch (pillType) {
  case Pill.TYPE_USER_MENTION: {
  - const localMember = this.props.room.getMember(resourceId);
  + const localMember = nextProps.room.getMember(resourceId);
  member = localMember;
  if (!localMember) {
  member = new RoomMember(null, resourceId);
  @@ -112,6 +111,11 @@ const Pill = React.createClass({
  this.setState({resourceId, pillType, member, room});
  },
  + componentWillMount() {
  + this._unmounted = false;
  + this.componentWillReceiveProps(this.props);
  + },
  +
  componentWillUnmount() {
  this._unmounted = true;
  },
  