fixes max weight on surgery cases (#3881)

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## About The Pull Request
Makes it so the Circ-Saw and the 7th item can fit in by defining a max
combined weight to the item
(I am aware it's infinity but there is a cap to the amount of items that
can be held. If someone wants to use cases to smuggle 7 circ saws at a
time then be my guest.)

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## Why It's Good For The Game
So surgery cases work as intended.
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## Changelog

:cl:
fix: surgery cases now hold all the items
/:cl:

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code/game/objects/items/storage/cases.dm

@@ -30,7 +30,8 @@
 /obj/item/storage/case/surgery/ComponentInitialize()
 	. = ..()
 	var/datum/component/storage/STR = GetComponent(/datum/component/storage)
-	STR.max_w_class = WEIGHT_CLASS_NORMAL
+	STR.max_w_class = INFINITY //workaround for the differently sized items, case is still limited to 7 items max and to the list.
+	STR.max_combined_w_class = INFINITY //part of the workaround, not setting a max combined weight defaults to some weird number.
 	STR.max_items = 7
 	STR.set_holdable(list(
 		/obj/item/healthanalyzer,