Hello Just Me,
What you see is normal behavior of Visual Studio. However you could try creating your own component with the necessary properties and use it to put what you need in the resx file.
In case you have other questions, please open a new support ticket or forum post on the topic - we would prefer to have different topics in different threads for consistency and easiness to follow.
Thanks.
Kind regards,
Jordan
the Telerik team
Check out
Telerik Trainer, the state of the art learning tool for Telerik products.