Vertical virtualization of horizontal lists.

[EndyZhou]

Is your feature request related to a problem? Please describe.
Could you provide an example of vertical virtualization for a horizontal list, similar to the UI shown below?

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[Yria]

#158

This is not currently supported and requires either a listview inside a scrollview or a scrollview inside a listview.
Since offsetFromStart only supports scrollview, you should choose one or the other depending on the scroll position when scrolling.