[Suggestion] The mute self and mute all button

I'm not sure was this ever suggested, even though it might look weird I believe it would be incredibly useful to a lot of people, and I also believe it would lower the amount of toxicity (and bans) in the game, at least for the people who realize that they can't "control themselves" but know that they are doing a wrong thing. It could be added in the client settings and only way to mute/remove the mute is through the client itself, but once the game starts you are stuck with it. Something like this,

http://i.imgur.com/7hOxCrR.png