boost(Configuration): Cleanup configuration of any duplicated device …

…by name clean

Only need to do this once, after that we do support that use case

Fixes #943

SoundSwitch/Framework/Configuration/SoundSwitchConfiguration.cs

@@ -209,6 +209,13 @@ public bool Migrate()
                 migrated = true;
             }
 
+            if (!MigratedFields.Contains("CleanupSelectedDevices"))
+            {
+                SelectedDevices = SelectedDevices.DistinctBy(info => info.NameClean).ToHashSet();
+                MigratedFields.Add("CleanupSelectedDevices");
+                migrated = true;
+            }
+
             return migrated;
 #pragma warning restore 612
         }