With the current implementation of the control changing the default editor of the Column when edit mode is entered in not supported. I have logged this in our Feedback portal on your behalf and you can follow it in order to receive notifications on status changes at the link below:
I am afraid that due to the specificity of the implementation of the control, currently I cannot suggest you any suitable solution that you can use in order to achieve the desired functionality. I have updated your Telerik points for bringing this to our attention.
If you have any additional questions or concerns, please let me know.
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