Item Preset Keys (Concept)

So, I've been thinking recently about something I feel would help me and a lot of players in League.

I had the idea when one time, wondering why I have to move my Health Potion to my 2 slot every time, or why I have to put Mercurial in my 3 slot every time. Then I got the idea to post this concept to the boards because one time, when a Syndra stunned me, I scrambled to hit my 3 key to use my QSS , only to be disappointed because it didn't go off. Then after I died very frustratingly, I realized my QSS was on my 7 key because I bought it and forgot to move it.

So I have one question. With the new client out, how hard would it be to make it so a summoner can have preset keys for certain items? I believe this has a good spot next to the item set creator, to allow a champion to assign an item to a certain key. I don't know about you, but I like it when my QSS is on my 3 key, because that's where it always is, and when I'm stunned, I don't have time to look at my items and figure out which number to push.

Alternatively, this function can be put into the key binds section of the settings, where there's a group of settings called "Item Keys" or something like that. With a list of every usable item. This seems way more counter-intuitive though, since there's usable items that build into other usable items and not to mention a massive amount of usable items which means a long list to look through. I believe if it was thought over for a while, a solution would come easily. Like having a setting in to turn on that allows items built from your usable item to be placed in the same key slot.

Thanks for reading my suggestion, and if you have any ideas, support or criticisms, be sure to let me know. Have a nice day!