Send messages when particular keys are pressed
onEnter : msg -> Element.Attribute msg
Send msg when Enter key is pressed
onEscape : msg -> Element.Attribute msg
Send msg when Escape key is pressed
onKey : String -> msg -> Element.Attribute msg
Send msg when keyValue key is pressed. Keyvalue must be a string that is the value of a particular key
onKey "Enter" msg
onKey "Q" msg