Make sure to cleanup after synchronized realms as well. (#1621)

* Make sure to cleanup after synchronized realms as well.

* Don't try to delete if directory doesn't exist

Author: nirinchev

Realm/Realm/Realm.cs

@@ -168,6 +168,11 @@ public static void DeleteRealm(RealmConfigurationBase configuration)
             File.Delete(fullpath + ".log");
             File.Delete(fullpath + ".lock");
             File.Delete(fullpath + ".note");
+
+            if (Directory.Exists($"{fullpath}.management"))
+            {
+                Directory.Delete($"{fullpath}.management", recursive: true);
+            }
         }
 
         private static bool IsRealmOpen(string path)