### Bug report
When reordering expanded rows, the "rowReorder" event does not return a correct "oldIndex".
### Reproduction of the problem
1. Create a hierarchical grid and enable the reorderable.rows property;
2. Expand all rows;
3. Handle the "rowReorder" event and log the event data in the browser console;
4. Move the second row above the first row. The property "oldIndex" returns a wrong value. It should be "1".
A Dojo sample for reproduction: https://dojo.telerik.com/AJIGuBEh
### Expected/desired behavior
The "rowReorder" event of the grid should return the correct indexes of the moved row.
### Environment
* **Kendo UI version: 2022.1.301
* **jQuery version: 1.12.4
* **Browser: [all]