fix Ring 3 compare showing when not applicable (#9266)

Author: Peechey

src/Classes/ItemsTab.lua

@@ -3899,7 +3899,7 @@ function ItemsTabClass:AddItemTooltip(tooltip, item, slot, dbMode)
 		-- Build sorted list of slots to compare with
 		local compareSlots = { }
 		for slotName, slot in pairs(self.slots) do
-			if self:IsItemValidForSlot(item, slotName) and not slot.inactive and (not slot.weaponSet or slot.weaponSet == (self.activeItemSet.useSecondWeaponSet and 2 or 1)) then
+			if self:IsItemValidForSlot(item, slotName) and not slot.inactive and (not slot.weaponSet or slot.weaponSet == (self.activeItemSet.useSecondWeaponSet and 2 or 1)) and slot.shown() then
 				t_insert(compareSlots, slot)
 			end
 		end