Polaris tweaks.

Fixes mistake involving belts.
Fixes mistake involving bags allowing w_class 5 items, which was from the manual merge.
Polaris tweaks

Makes inflatables w_class 3.
Spacesuits and RIGs are now w_class 5.
Both sniper weapons are now w_class 5.
Makes more inventories able to use the volume based system.
Cleans up the cig part of the port a bit.

code/modules/projectiles/guns/energy/laser.dm

@@ -89,7 +89,7 @@ obj/item/weapon/gun/energy/retro
 	max_shots = 4
 	fire_delay = 35
 	force = 10
-	w_class = 4
+	w_class = 5 // So it can't fit in a backpack.
 	accuracy = -3 //shooting at the hip
 	scoped_accuracy = 0
 

code/modules/projectiles/guns/projectile/sniper.dm

@@ -3,7 +3,7 @@
 	desc = "A portable anti-armour rifle fitted with a scope, the HI PTR-7 Rifle was originally designed to used against armoured exosuits. It is capable of punching through windows and non-reinforced walls with ease. Fires armor piercing 14.5mm shells."
 	icon_state = "heavysniper"
 	item_state = "l6closednomag" //placeholder
-	w_class = 4
+	w_class = 5 // So it can't fit in a backpack.
 	force = 10
 	slot_flags = SLOT_BACK
 	origin_tech = list(TECH_COMBAT = 8, TECH_MATERIAL = 2, TECH_ILLEGAL = 8)