Disables KeymanWeb input handling for the specified control.
- Element to become KeymanWeb-disabled.
This function is used to explicitly disable KeymanWeb input handling for a previously-attached control, adding the class
'kmw-disabled' property to the element as necessary. It will not, however, detach KeymanWeb from the control,
and any KeymanWeb-specific metadata will persist until KeymanWeb is explicitly detached from the element.
'kmw-disabled' is added to the control via other means,
disableControl() will be called
upon it automatically and non-recursively.
If called on an element in an unattached state, the
'kmw-disabled' tag will be added to the element.