Ref T632, use rendered and callsign as tie breaker if distance is equal in snapshot

src/blackmisc/simulation/simulatedaircraftlist.cpp

@@ -266,5 +266,15 @@ namespace BlackMisc
             }
             return c;
         }
+
+        void CSimulatedAircraftList::sortByDistanceToReferencePositionRenderedCallsign()
+        {
+            this->sort([ & ](const CSimulatedAircraft & a, const CSimulatedAircraft & b)
+            {
+                if (a.getRelativeDistance() != b.getRelativeDistance()) { return a.getRelativeDistance() < b.getRelativeDistance(); }
+                if (a.isRendered() != b.isRendered()) { return a.isRendered(); } // get the rendered first
+                return a.getCallsignAsString() < b.getCallsignAsString();
+            });
+        }
     } // namespace
 } // namespace