stack cleanup and mild refactoring (#11717)

* stack cleanup

* fix tests and ulong

* somehow did half a commit

* ulong got usmall. (it's ints now)

* sussy baka cleanup

* mirror's review

* make da tests pass again

* shadowcommander review

* sloth por favor

* Update StoreSystem.Ui.cs

Content.Shared/Materials/SharedMaterialStorageSystem.cs

@@ -166,7 +166,6 @@ public abstract class SharedMaterialStorageSystem : EntitySystem
         }
 
         var multiplier = TryComp<SharedStackComponent>(toInsert, out var stackComponent) ? stackComponent.Count : 1;
-
         var totalVolume = 0;
         foreach (var (mat, vol) in component.Storage)
         {