Makes loadout datums more flexible.

Loadout item definitions can now also take a list of tweaks, which will adjust the item after spawn.
Currently includes color and icon state changes.

code/modules/client/preference_setup/loadout/gear_tweaks.dm

@@ -0,0 +1,28 @@
+/datum/gear_tweak/proc/apply_tweak(var/obj/item/I)
+	return
+
+/*
+* Color adjustment
+*/
+/datum/gear_tweak/color
+	var/item_color
+
+/datum/gear_tweak/color/New(var/item_color)
+	src.item_color = item_color
+	..()
+
+/datum/gear_tweak/color/apply_tweak(var/obj/item/I)
+	I.color = item_color
+
+/*
+* Icon state adjustment
+*/
+/datum/gear_tweak/icon_state
+	var/icon_state
+
+/datum/gear_tweak/icon_state/New(var/icon_state)
+	src.icon_state = icon_state
+	..()
+
+/datum/gear_tweak/icon_state/apply_tweak(var/obj/item/I)
+	I.icon_state = icon_state

code/modules/client/preference_setup/loadout/loadout.dm

@@ -157,5 +157,10 @@ var/list/gear_datums = list()
 	var/list/allowed_roles //Roles that can spawn with this item.
 	var/whitelisted        //Term to check the whitelist for..
 	var/sort_category = "General"
+	var/list/gear_tweaks = list() //List of datums which will alter the item after it has been spawned.
 
-
+/datum/gear/proc/spawn_item(var/location)
+	var/item = new path(location)
+	for(var/datum/gear_tweak/gt in gear_tweaks)
+		gt.apply_tweak(item)
+	return item