[Trlog] 6.79 mode detection

[VR2BrettGraham]

6.79 thinks a K2 is in CW-reverse mode when in fact it is in DIG-reverse mode.

Long ago, I gave up on radio control for RTTY with my MP as TR kept thinking
CW was what I wanted when rig was in FSK mode - so maybe it's not just
6.79/K2/DIG-reverse.

Since RTTY isn't going anywhere, maybe TR could do CW when it senses the
rig is in LSB - just for consistency?  ;^)

73, VR2BrettGraham