Lazy build for rows

[maxim-saplin]

Add feature to lazily build rows while scrolling. Might help with stutters with huge rows. E.g. https://github.com/maxim-saplin/data_table_2/issues/230

Options to investigate:

1. Build rows while scrolling and reaching them
2. Build rows in the background after the initial set of rows is displayed, the rest might be built behind the scenese

[mbfakourii]

@maxim-saplin

Any progress ?

[maxim-saplin]

@maxim-saplin

Any progress ?

Nope