Werk #2223: Allow cancelling actions to be omitted if the cancelled event is not (yet) open

If you have an Event Console rule that uses delaying or counting at the same time as cancelling, and if this rule furthermore defines actions when cancelling, then you can have these actions only be executed if the event has made it in to the open phase. The default is still the old behaviour: that cancelling actions are also executed when the event is still being delayed or in phase counting

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