Bug report

Navigatable Grid with hierarchy moves focus to the top parent row On click of horizontal scroll bar in child grid

Reproduction of the problem
Open the Dojo: https://dojo.telerik.com/OJAYoCak

 - Expand the first parent row or second parent row to render the child records.

 - Navigate the child rows downwards using vertical scroll and click the Horizontal scroll area of the inner grid (Red Rounded area).

 - Control Focus immediately shifts to the top row and the user can’t use horizontal scroll to view the columns in the child grid.

Also, if the user initially clicks on any cell in the School Name column focus is moved.

Environment
Kendo UI version: [all]
Browser: [all]