Bug report

TreeList shows wrong total and paging when we expand or collapse a row after filtering.

Reproduction of the problem

1. Go to TreeList demo link - https://demos.telerik.com/kendo-ui/treelist/index
2. On "Position" column apply filter with value "VP, Engineering"

3. After filtering only 4 rows will be visible, and the number of rows at the bottom of grid shows "1 - 4 of 4 items".
4. Now collapse the second row. Notice that the total at the grid bottom changes to "1 - 15 of 4 items" which is wrong.

Expected/desired behavior

The shown message within the pager has to be "1 - 4 of 4 items" instead of "1 - 15 of 4 items".

Environment

* **Kendo UI version:** 2019.3.1024
* **jQuery version:** 1.12.4
* **Browser:** [all]