{CALL_ENTERED} macro should pull from radio indicated by activeRadio,
not activeTxRadio. Test case:

NA Sprint

CQ mode both radios. Start 2nd radio CQ from radio 1. Enter S&P mode
on radio 1. Enter call, down arrow and enter exchange.

Press F2 to send exchange. Call of station being worked is missing
because activeTxRadio was set to 1 by the 2nd radio cq.