KeyNotifier Events should be filtered on the client side

[simasch]

When adding a Key Listener on a KeyNotifier the keys are filtered on the server side.

Each key event is sent to the server, and this produces 1) unnecessary traffic and 2) the loading indicator is displayed very often if the key listener is on a TextField or TextArea and the user types.

Wouldn't it be better to filter the keys on the client side and only send the event if the defined key is pressed?