Wraps children with styled scrollbars.
<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>
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.