Suggestion: Receive Only setting

[packman2008]

I'm currently looking at the sBitx v2 from a software development perspective so not often transmitting. In the place I normally work I only have a receive active antenna so I don't want to transmit into that otherwise I might fry the active circuitry. A receive only setting would be useful. Maybe turning it on would set RF gain to 0, prevent the gain from being increased, lock out any transmit buttons or maybe doing something to prevent the transmitter code from being run. Then I can feel less worried about accidentally hitting a TX button!