Currently, it's very difficult to set up a grid that has a calculated column, where the result is not editable by the user.

It's pretty easy to set up a javascript function to calculate and update the value using `dataItem.set("Column", value)`, but this does not work if the column is not also Editable.

Currently, you need to hack together some kind of text replacement for the Editor Template, and there doesn't appear to be a simple way to do this from the MVC wrappers. You can create a disabled or readonly textbox, but I'd prefer that it looks like those columns where Editable is set to false.