Show count of enchanted items in stack in the spells list
In vanilla each item has its own entry in the magic list. In OpenMW there's only one entry for each stack.
Generic magic apparel stacks in the inventory in both engines if it has full charge, that's not a factor here.
In OpenMW, any item with a (partially) depleted charge gets its own entry, even if its state is identical to another item, probably because depleted items don't stack.
Maybe instead of listing each item's effect individually like vanilla does, items with the same effect and full charge should have an (xN) or something next to their names, where N is the number of items with the same effect and full charge.