Common/Scrollbar
================
Wraps children with styled scrollbars.

![Scrollbar example](../../assets/images/scrollbar-1.png)

```jsx
<Scrollbar>
    <p>Line one</p>
    <p>Line two</p>
    <p>Line three</p>
    <p>Line four</p>
    <p>Line five</p>
    <p>Line six</p>
    <p>Line seven</p>
</Scrollbar>
```

### CSS
Adds `dp-scrollbar` to wrapping element.

Adds `dp-scrollbar__track-vertical` to the vertical track.

Adds `dp-scrollbar__track-horizontal` to the horizontal track.

Adds `dp-scrollbar__thumb-vertical` to the vertical thumb.

Adds `dp-scrollbar__thumb-horizontal` to the horizontal thumb.