Consistent use of class names "dtr-control" and "control"

Description of problem:
I know that class names dtr-control and control can be used both to mark the table cells for the child row display button.

However, I think you should stick to one "official" class name to avoid confusion and/or explicitly state that both class names can be used.

Examples:
Here you say:

Please note that the column defined here should have the class control added to it.

Here you say:

... on this column along with using the class dtr-control so it received the correct styling options.

I did not check for other occurences as I think you can do it more easily than me.