Created by: Durman
Addressed problem description
It fixes the problem when new scene events come during execution of a previous scene event
https://github.com/nortikin/sverchok/issues/4510#issuecomment-1149470386
Also it leads to a problem that not all user scene events are handled (probably this is lesser evil)
Closes #4510 (closed)
Preflight checklist
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Code changes complete.