FT-891: Changed TX and RX commands to use the MX command. (K9TR) (Coded by K3CT) Ham Spirit contest - converted one digit zone into 0x format in SentExchange (Coded by NA3M) The {CATAxxxx} and {CATIxxxx} macros now work correctly. (Coded by N2IC) Prevent flickering when holding down the modifier keys (Coded by N1MM)