Add ^{enter} expression for custom messages

[DavidAlcns]

Already coded it, should be something like this:

 else if (valueLower.IndexOf("{ctrlEnter}") == 0)
 {
System.Windows.Forms.SendKeys.SendWait("^{ENTER}");
}

Config.txt:

   {
      "keycode": 59,
      "value": "{ctrlEnter}Sorry, That item has already been sold. item{enter}",
      "position": null,
      "ctrl": true
    },

If there's something wrong, don't hesitate to tell me!