[Elecraft] K3: PF1 ends transmit in DATA A mode

[Leigh L. Klotz, Jr WA5ZNU]

I was using PSK31 in DATA A mode and wanted to enable the speakers, 
which I have set to PF1.
I pressed PF1 and it ended the transmission, but my PSK program was of 
course unaware that this happened.
So I had to abort TX from it and start over.

Might it be possible to have the PF keys abort transmission only if 
appropriate?
Pressing the MON/CMP/PWR button to change the modes for the control 
doesn't abort TX, for example.

Leigh/WA5ZNU