Add config for muting all games sounds when deafened.

[Phylogeny]

It's not as nice, in my opinion; but it's worth adding as an option.

This PR also:

1. Prevents the attempt to mute sounds when the percent is set to 1 (which in-turn prevents needlessly iterating through playingSounds).
2. Centers (even while rotating) stun grenade entity models within their hitboxes, and moves them to the bottom to prevent them from hovering above the ground.

[MrCrayfish]

While going through the changes, I believe syncing the server config to client causes problems. It doesn't restore the clients config after leaving a server. A previously powerful weapon may become weak after joining and leaving a server.

[MrCrayfish]

I can go ahead and merge this. The solution to fix is to have a copy of the config then simply use getters instead of directly accessing the config values. Inside the getter I can check if the server config is not null, return the servers value otherwise just return client value.