Ports Welding Hard Hats from /tg/

Changelog:
modules/clothing/head/Hardhat.dm:
-Added Welder Hard Hats & various colours
--They function as a combi hard hat & welder mask, but have a slightly dimmer head lamp
modules/clothing/vending/wardrobes.dm
-Added 3 Welder Hard Hats to the Engi-drobe and Atmos-drobe
-Equalized some values between the two (3 atmos winter coats now instead of 5, and 3 engineering dufflebags instead of 2)
game/objects/structures/crates_lockers/closets/secure/engineering.dm
-Replaced the welding mask in the CE's locker with a white WHH (This one has brighter buld in it! Same brightness as a regular hard hat)
datums/action.dm
- Added the item_action to lower the WHH's face shield
icons/mob/head.dmi
-Added weldervisor + welderhat, which are used by the WHH's
-Recoloured hardhat0/1_dblue to be in atmos colours as I've never seen it on the station before and this way is actually used
icons/mob/obj/hats.dmi
-Added weldervisor, again, used by the WHH's
-Repositioned the hardhat sprites up several pixels so they don't clip and look weird with the weldervisor
-Recoloured hardhat0/1_dblue to be in atmos colours as I've never seen it on the station before and this way is actually used

code/datums/action.dm

@@ -245,6 +245,14 @@
 /datum/action/item_action/toggle_helmet_light
 	name = "Toggle Helmet Light"
 
+/datum/action/item_action/toggle_welding_screen
+	name = "Toggle Welding Screen"
+
+/datum/action/item_action/toggle_welding_screen/Trigger()
+	var/obj/item/clothing/head/hardhat/weldhat/H = target
+	if(istype(H))
+		H.toggle_welding_screen(owner)
+
 /datum/action/item_action/toggle_headphones
 	name = "Toggle Headphones"
 	desc = "UNTZ UNTZ UNTZ"