Misclicking (hitting key by accident) is not recoverable

[kmindi]

Current behavior:
Hitting a key increases the counter, which is fine. But I can not recover to the state bevore if i hit that key by accident.

Expected behavior:
Pressing STRG+U (Undo) should pause (don't use toggle as then video may be resumed, needs separate function) the video and counters and reset counters to the last state before hitting key.
Therefore hitting a key should store all counters and slicetimers as well as the current video time in a status object and after saving should change the counter and the current timer.