message: dont render who is typing tile when no room available (like in notif panel)
diff: @@ -664,6 +664,11 @@ module.exports = React.createClass({
  },
  );
  + let whoIsTyping;
  + if (this.props.room) {
  + whoIsTyping = (<WhoIsTypingTile room={this.props.room} onVisible={this._scrollDownIfAtBottom} />);
  + }
  +
  return (
  <ScrollPanel ref="scrollPanel" className={className}
  onScroll={this.props.onScroll}
  @@ -674,7 +679,7 @@ module.exports = React.createClass({
  stickyBottom={this.props.stickyBottom}>
  { topSpinner }
  { this._getEventTiles() }
  - <WhoIsTypingTile room={this.props.room} onVisible={this._scrollDownIfAtBottom} />
  + { whoIsTyping }
  { bottomSpinner }
  </ScrollPanel>
  );
  