Make a warning window when buying items with the same unique passive.

Some of my friends new to the game don't really read the item description carefully.

My suggestion is when you try to buy a second Hextech Revolver, a message pops up like this:

You are about to buy an item with the same unique passive you already have: +20% spell vamp Reload

Do you still want to buy it anyway? Yes No

And make a "Don't ask again" checkbox. It would help newbies a lot! Please consider this clarity. Please upvote and comment if you like this. It would make more people see this.

I uploaded the picture for how it looks like. Pardon my Paint skill level.