feat.勾选启动模拟器后，若客户端版本未选择，则自动设置为官服

fix  https://github.com/MaaAssistantArknights/MaaAssistantArknights/issues/818

src/MeoAsstGui/ViewModels/SettingsViewModel.cs

@@ -188,6 +188,10 @@ namespace MeoAsstGui
             {
                 SetAndNotify(ref _startEmulator, value);
                 ViewStatusStorage.Set("Start.StartEmulator", value.ToString());
+                if (ClientType == "" && Idle)
+                {
+                    ClientType = "Official";
+                }
             }
         }