Removed the functional change I made for #874.

Introduced the term Radio Backup File to describe the eprom files that are uploaded from the radio.
The terms Radio, Tx and TX were used intermittently. I changed them all to Radio (naturally not in contexts having anything with the actual radio transmitting circuit).

companion/src/modelslist.cpp

@@ -449,7 +449,7 @@ void ModelsListWidget::doPaste(QByteArray *gmData, int index)
     i++;
     gData++;
     if(c=='G') { //General settings
-      ret = QMessageBox::question(this, "Companion", tr("Do you want to overwrite TX general settings?"),
+      ret = QMessageBox::question(this, "Companion", tr("Do you want to overwrite radio general settings?"),
               QMessageBox::Yes | QMessageBox::No);
       if (ret == QMessageBox::Yes) {
         radioData->generalSettings = *((GeneralSettings *)gData);