New option for the when slot signals hat block

[c0der0928]

when slot [a V] signals [insert V] this [detects when a slot gets a reporter/predicate inserted, and can be useful for some contexts, like for example when that one guy suggested when block that changes color from its input] :: command when slot [a V] signals [remove V] this [detects when a slot gets a reporter/predicate removed, and can be useful if you want to make something that does something when you take the thing out] :: command
also setting a slot to something other than a text/number on an any slot shouldnt make it stringified, like setting it to a ring shouldnt make it set to Context >> [a RingMorph ("%rr %ringparms...")] a VariableFrame {}