Add loading indicator or skeleton rows while scrolling to newly loaded areas

[danielpmichalski]

Currently, while scrolling around, when you hit the area with no data, there's nothing but blank area. It would be great if you could implement skeleton for the rows being loaded.

Something similar to what antd-table-infinity has done with loadingIndicator; see: https://github.com/Leonard-Li777/antd-table-infinity

[danielpmichalski]

Or at least provide some info that data is being loaded via some handler