Switch chat channel is now unbound by default, as it's not used much and...

Switch chat channel is now unbound by default, as it's not used much and people ended up on different channels by mistake

game/engines/default/data/keybinds/chat.lua

@@ -32,7 +32,7 @@ defineAction{
 }
 
 defineAction{
-	default = { "sym:_SPACE:false:true:false:false" },
+	default = {  },
 	type = "USERCHAT_SWITCH_CHANNEL",
 	group = "user chat",
 	name = _t"Cycle chat channels",