Keystone In The Buffs Bar

I don't know if there is a way to show this, but I thought it would be nice if Riot could maybe show the mastery keystone in the buff bar. For example: Thunderlords mastery keystone where the dragon/baron buffs are. It would be nice if it would show a cooldown also. Certain mastery keystones show in the buff bar, but it would be nice if every keystone did. Considering people just estimate the cooldown on the keystone, this would help players a lot. Thank You!