[3.x] Use set and clear debouncer upon completion. Fixes #5250. #5499
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Description
The queue used to allow debouncers to be flushable did not have a mechanism to be cleared outside of calling
flush()
.This change switches the queue to use a
Set
instead of anArray
to allow for O(1) removals, and ensures debouncers are cleared from the queue once they run.Reference Issue
Fixes #5250