[Enhancement][TabStrip] All div elements should have a respective class

[WissamProgress]

I'm submitting a...

• Suggestion for improvement

Current behavior

The div that is a child to the k-child-animation-container and has id :r1:-content-panel-id0 does not have a class, making it not easy to access it.

For example, we can currently access it using the following: .k-tabstrip-content .k-child-animation-container > div

Expected behavior

This div element should have a class in order to access it, like the rest of the div elements in the TabStrip.

Minimal reproduction of the problem with instructions

Open any demo of the TabStrip and inspect it using the DevTools - https://www.telerik.com/kendo-react-ui/components/layout/tabstrip/

Reported in Ticket ID: 1642423