Checkmk Werk 15060: EventConsole: Allow withdrawal of acknowledge command

ID: 15060 Title: EventConsole: Allow withdrawal of acknowledge command Component: REST API Level: 1 Class: New feature Version: 2.2.0i1 Event console events can currently be acknowledged via the REST API, however, to align with the GUI functionality, this change will allow the user to also withdraw the acknowledgemnt via the REST API. As a result of this change, the user can also ack all open events or withdraw all acked events.