[MIRROR] Moves destroy_on_drop to TG style and adds signal (#11640)

Co-authored-by: Will <7099514+Willburd@users.noreply.github.com>
Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/game/objects/items.dm

@@ -129,7 +129,6 @@
 	var/list/warned_of_possession //Checks to see who has been informed this item is possessed.
 	var/cleaving = FALSE // Used to avoid infinite cleaving.
 	var/list/tool_qualities
-	var/destroy_on_drop = FALSE	// Used by augments to determine if the item should destroy itself when dropped, or return to its master.
 	var/obj/item/organ/my_augment = null	// Used to reference the object's host organ.
 	var/datum/identification/identity = null
 	var/identity_type = /datum/identification
@@ -429,6 +428,14 @@
 	for(var/datum/action/action_item_has as anything in actions)
 		action_item_has.Remove(user)
 
+	if((item_flags & DROPDEL) && !QDELETED(src))
+		qdel(src)
+
+	SEND_SIGNAL(src, COMSIG_ITEM_DROPPED, user)
+
+	if(my_augment && !QDELETED(src))
+		forceMove(my_augment)
+
 // called just as an item is picked up (loc is not yet changed)
 /obj/item/proc/pickup(mob/user)
 	SEND_SIGNAL(src, COMSIG_ITEM_PICKUP, user)