Indicates if grid should listen to keyboard.
Boolean, default = true
If .keyboard property is set to true, the grid will add event listener to listen for keyboard events. There are several keyboard keys linked to the grid actions:
This property can be defined during object creation: Or any time after the grid has been created: Internally, the feature is implemented by w2utils.keyboard object. If there more then one grid on the screen and all of them have .keyboard set to true, then the last grid where user selects a record will active keyboard listener.