Better Item list filters

Okay, so upon remaking some of my champion item lists I noticed that items from all across the new/old game modes are in the lists. Not only that but items that are map specific are also littering the lists. To some degree I can see why this is a thing but for someone like me, and most of the player base, I know the items by icon and don't have to hover over them to read what they do. My problem is that some items have the exact same icon as the Summoner's Rift copy. This means that some items on my list are not the correct ones for Summoner's Rift. I just want some way to simply either filter the items so that I see only Summoner's Rift items, Howling Abyss items, or even Twisted Treeline items instead of seeing all items and having to read them carefully to make sure I'm not putting an item on my list that isn't allowed on Summoner's Rift. That, or allow us to "delete" special game mode items from the list and items that are not allowed on that specific map.

Now I know that 's items are also on this list but those I can see why you would want to keep them because you may not always remember what items he can buff even if you are playing Ornn, but items from game modes that are no longer available, or items from different map types should be able to be filtered out or removed from the item list upon the Summoner's request. That would make the item list for someone new less confusing and less cluttered so that they can see what items are allowed to be used on the map type they are building their list for.

TL;DR Allow us to filter our item lists so that we don't have past game mode items or items for different map types on the list.