RECI cleaning

I'm going through RECI to clean and tidy up issues with it.

@svornost

Few questions:

<<for _RECI = 0; _RECI < $REButtholeCheckinIDs.length; _RECI++>>
	<<if $REButtholeCheckinIDs[_RECI] == $activeSlave.ID>>
		<<set $REButtholeCheckinIDs.deleteAt(_RECI)>>
		<<break>>
	<</if>>
<</for>>

can be replaced with <<run $REButtholeCheckinIDs.deleteWith((s) => s === $activeSlave.ID)>>?

In addition, I'm wondering if I should just convert the things to JS while doing this. It'd take about as much effort. The big question would be how to handle V.REButtholeCheckinIDs.includes(eventSlave.ID). I'd just throw it into actorPrerequisites() as V.REButtholeCheckinIDs.includes(s) or V.REButtholeCheckinIDs.includes?