Sprite fixes and tweaks galore (#7374)

Fixes/tweaks:
        Wallets, lanyards, mining carts, Einstein Engines ID, and improvised sword missing sprites.
        Outlines / colors on engineering and cargo outfits, ore and sheet snatchers, atmos fire helmet and hardhats, and safety goggles.

Fixes #7371

code/game/objects/items/devices/PDA/cart.dm

@@ -1,7 +1,7 @@
 /obj/item/weapon/cartridge
 	name = "generic cartridge"
 	desc = "A data cartridge for portable microcomputers."
-	icon = 'icons/obj/cart.dmi'
+	icon = 'icons/obj/cartridge.dmi'
 	icon_state = "cart"
 	item_state = "electronic"
 	w_class = 1

code/game/objects/items/devices/paicard.dm

@@ -1,6 +1,6 @@
 /obj/item/device/paicard
 	name = "personal AI device"
-	icon = 'icons/obj/pda.dmi'
+	icon = 'icons/obj/pai.dmi'
 	icon_state = "pai"
 	item_state = "electronic"
 	w_class = 2.0