Error-reporting: track keyboard-actions from user

therootcause logs mouse-events, but we cannot see what the user typed, copied, pasted, ... Even the video (if enabled and activated) does not show that. The Snapshot-History at least shows the results from the keyboard-actions, but the difference (in order to figure out what action has been taken) is hard to trace.

Hence, we now also track the keyboard-actions in the error-log.