There is no such property because different scenarios require different visual appearance. This functionality can be easily achieved, both on the client and on the server, depending on your preferences.
I prepared a sample project which demonstrates the desired setup on the client. Achieving this on the server is very similar and uses the same logic. Feel free to extend this example further and use other elements or styles if you prefer so.
In case you still experience problems in implementation, please, open a new support ticket and provide a sample project and detailed explanation of the desired appearance and behavior.
All the best,
the Telerik team