Spot a call locally and wipe when the radio moves far on a QSY

With a call in the entry window, a move of more than 2 kHz on the same
band puts the call on the bandmap where it was heard and wipes the boxes,
as N1MM does. The spot goes to the other stations as ADDSPOT and to the
Spots broadcast, never to the cluster. ADDSPOT from other stations is
added to the bandmap.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/Nonemm.App/AppSession.MirrorRadio.cs

@@ -66,7 +66,7 @@ public sealed partial class AppSession
         {
             return;
         }
-        position.Tune(frequency, mode, transmit);
+        TuneAndSpot(position, frequency, mode, transmit);
     }
 
     /// N1MM names reverse CW and FSK differently from our modes. Null for a