Item Size Adjustments (#22476)

Small handful of obj/item size adjustments for common sense, QoL, and
standardization.

changes:
  - balance: "Decreases size of Dosimeter from Normal to Small."
- balance: "Decreases size of Bomb Defusal Wirecutters and Music
Cartridge from Small to Tiny."
- balance: "Increases size of Airlock Electronics from Tiny to Small
(matches other circuitboards)."

code/modules/clothing/ears/earphones.dm

@@ -399,7 +399,7 @@ Earphone Variants
 	desc = "A music cartridge."
 	icon = 'icons/obj/item/music_cartridges.dmi'
 	icon_state = "generic"
-	w_class = WEIGHT_CLASS_SMALL
+	w_class = WEIGHT_CLASS_TINY
 	var/list/datum/track/tracks
 	/// Whether or not this cartridge can be removed from the datum/jukebox it belongs to.
 	var/hardcoded = FALSE