Tooltip: rerenders incorrectly if tooltip element content width changed

[dearlordylord]

Hey,

notice how it rerenders itself if content width is changed: it starts new content width where old content left side was placed initially, making it sort of 'left-aligned', and moving upper triangle in incorrect place therefore

Code looks like this:

render() {
    const {placement} = this.props;
    return <OverlayTrigger placement={placement} overlay={<Tooltip>{this.props.title}</Tooltip>}>
      <div className={cx(this.props.className)}>
        {this.props.children}
      </div>
    </OverlayTrigger>;
  }

No additional class-related css was applied.

[taion]

#1438