Describe the bug
When expanding/collapsing grouped data in the Grid re-renders all Grid rows while only the collapsed ones should be re-rendered.

To Reproduce

1. Open this CodeSandbox
2. Collapse a group
3. Open the browser's console and see that row-render has been called 1000 times

Expected behavior
The row-render method should be called for the rows that hold the collapsed data, not for all Grid rows.