Final Pass

Breaks Facial Hair updates into their own proc and puts facial hair on
its own layer.
Works through everything that calls update_hair with the intention of
updating facial hair and adds update_fhair
Fixes the sprite names and colouring on all 'facial' and 'body marking'
aspects.

Fixes/implements proper ID photo/preferences preview picture generation.

To do: Tail marking customization possible rework, gutting in the
meantime

code/modules/reagents/newchem/other.dm

@@ -204,6 +204,7 @@ datum/reagent/hair_dye/reaction_mob(var/mob/living/M, var/volume)
 		H.g_hair = rand(0,255)
 		H.b_hair = rand(0,255)
 		H.update_hair()
+		H.update_fhair()
 	..()
 	return
 
@@ -229,6 +230,7 @@ datum/reagent/hairgrownium/reaction_mob(var/mob/living/M, var/volume)
 		H.h_style = random_hair_style(H.gender, H.species)
 		H.f_style = random_facial_hair_style(H.gender, H.species)
 		H.update_hair()
+		H.update_fhair()
 	..()
 	return
 
@@ -256,6 +258,7 @@ datum/reagent/super_hairgrownium/on_mob_life(var/mob/living/M as mob)
 		H.h_style = "Very Long Hair"
 		H.f_style = "Very Long Beard"
 		H.update_hair()
+		H.update_fhair()
 		if(!H.wear_mask || H.wear_mask && !istype(H.wear_mask, /obj/item/clothing/mask/fakemoustache))
 			if(H.wear_mask)
 				H.unEquip(H.wear_mask)