John,
Afraid not, that's the way the interface works at the moment. I tend to have the map hard up against the "Show All" button, but that hides the ADS-B Only button in the MyFlights window. You can always zoom in/out so that you can see the area you want and still see the Range and Bearing readout. I'm running 2 monitors and I use the higher definition monitor (1280 x 1024) for the RadarBox display.
My laptop has a "widescreen" monitor that works well with RB, as it allows more roof left and right for the map and list.