Make an option where "Shift + Right Click" could be "Target Champions only"

• I wonder why is it, that we can bind "Shift + Right Click" to "Attack-move", but there's no way to bind "Target Champions only" by the same combination of buttons.
• For me personally, this way it would work the best and I wouldn't have to hold some awkward button, that my fingers can hardly reach. Plus I never did use the Attack-move before...

   It would work simply like this:     - In case of basic attack, "Shift + Right Click" would target Champions only.     - In case of casting a spell, "Shift + Spell" would target Champions only.

   Please, notice this Riot and give us this option!    Would be really thankful ~