[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/weapons/handcuffs.dm

@@ -301,6 +301,7 @@ var/last_chew = 0
 	use_time = 0
 	breakouttime = 30
 	cuff_sound = 'sound/weapons/towelwipe.ogg' //Is there anything this sound can't do?
+	item_flags = DROPDEL
 
 /obj/item/handcuffs/legcuffs/bola/can_place(var/mob/target, var/mob/user)
 	if(user) //A ranged legcuff, until proper implementation as items it remains a projectile-only thing.
@@ -309,7 +310,6 @@ var/last_chew = 0
 /obj/item/handcuffs/legcuffs/bola/dropped(mob/user)
 	..()
 	visible_message(span_infoplain(span_bold("\The [src]") + " falls apart!"))
-	qdel(src)
 
 /obj/item/handcuffs/legcuffs/bola/place_legcuffs(var/mob/living/carbon/target, var/mob/user)
 	playsound(src, cuff_sound, 30, 1, -2)

code/game/objects/items/weapons/melee/energy.dm

@@ -407,6 +407,7 @@
 	active_armourpen = 25
 	projectile_parry_chance = 40
 	colorable = TRUE
+	item_flags = DROPDEL | NOSTRIP
 
 	hitcost = 75
 
@@ -422,6 +423,7 @@
 	desc = "A concentrated beam of energy in the shape of a blade. Very stylish... and lethal."
 	icon_state = "blade"
 	item_state = "blade"
+	item_flags = DROPDEL | NOSTRIP
 	force = 40 //Normal attacks deal very high damage - about the same as wielded fire axe
 	armor_penetration = 100
 	sharp = TRUE
@@ -455,10 +457,6 @@
 	user.drop_from_inventory(src)
 	QDEL_IN(src, 1)
 
-/obj/item/melee/energy/blade/dropped(mob/user)
-	..()
-	QDEL_IN(src, 1)
-
 /obj/item/melee/energy/blade/process()
 	if(!creator || loc != creator || !creator.item_is_in_hands(src))
 		// Tidy up a bit.

code/game/objects/items/weapons/mop_deploy.dm

@@ -3,6 +3,7 @@
 	desc = "Deployable mop."
 	icon = 'icons/obj/janitor.dmi'
 	icon_state = "mop"
+	item_flags = DROPDEL | NOSTRIP
 	force = 3
 	anchored = TRUE    // Never spawned outside of inventory, should be fine.
 	throwforce = 1  //Throwing or dropping the item deletes it.
@@ -57,10 +58,6 @@
 	user.drop_from_inventory(src)
 	spawn(1) if(!QDELETED(src)) qdel(src)
 
-/obj/item/mop_deploy/dropped(mob/user)
-	..()
-	spawn(1) if(!QDELETED(src)) qdel(src)
-
 /obj/item/mop_deploy/process()
 	if(!creator || loc != creator || !creator.item_is_in_hands(src))
 		// Tidy up a bit.

code/game/objects/items/weapons/storage/storage.dm

@@ -612,9 +612,6 @@
 	W.add_fingerprint(user)
 	return handle_item_insertion(W)
 
-/obj/item/storage/dropped(mob/user)
-	return ..()
-
 /obj/item/storage/attack_hand(mob/user as mob)
 	if(ishuman(user) && !pocketable)
 		var/mob/living/carbon/human/H = user