Dragging storage bags now drops items around the mouse pointer (#27790)

* Standardize attom scatter and make bag drops offset it based on mouse position

* Init sanity

* Update code/game/atoms_movable.dm

Signed-off-by: DGamerL <108773801+DGamerL@users.noreply.github.com>

---------

Signed-off-by: DGamerL <108773801+DGamerL@users.noreply.github.com>
Co-authored-by: DGamerL <108773801+DGamerL@users.noreply.github.com>

code/modules/reagents/chemistry/machinery/chem_master.dm

@@ -571,8 +571,7 @@
 		var/obj/item/reagent_containers/P = new item_type(location)
 		if(!isnull(medicine_name))
 			P.name = "[medicine_name][name_suffix]"
-		P.pixel_x = rand(-7, 7) // Random position
-		P.pixel_y = rand(-7, 7)
+		P.scatter_atom()
 		configure_item(data, reagents, P)
 		reagents.trans_to(P, amount_per_item)
 

code/modules/reagents/chemistry/machinery/pandemic.dm

@@ -82,8 +82,7 @@
 /obj/machinery/computer/pandemic/proc/create_culture(name, bottle_type = "culture", cooldown = 50)
 	var/obj/item/reagent_containers/glass/bottle/B = new/obj/item/reagent_containers/glass/bottle(loc)
 	B.icon_state = "bottle"
-	B.pixel_x = rand(-3, 3)
-	B.pixel_y = rand(-3, 3)
+	B.scatter_atom()
 	replicator_cooldown(cooldown)
 	B.name = "[name] [bottle_type] bottle"
 	return B