message: fix scrollToToken alignment
diff: @@ -518,7 +518,9 @@ module.exports = React.createClass({
  // convert bottomOffset so that it is based on the bottom of the
  // container.
  - bottomOffset += this._getScrollNode().clientHeight * (1-offsetBase);
  + const scrollNode = this._getScrollNode();
  + const viewportBottom = scrollNode.scrollHeight - (scrollNode.scrollTop + scrollNode.clientHeight);
  + bottomOffset += viewportBottom + scrollNode.clientHeight * (1-offsetBase);
  // save the desired scroll state. It's important we do this here rather
  // than as a result of the scroll event, because (a) we might not *get*
  