Goroutine wranglin (#7556)

* goroutine wranglin

* synchronize WebConn.WritePump

app/preference.go

@@ -55,7 +55,9 @@ func (a *App) UpdatePreferences(userId string, preferences model.Preferences) *m
 
 	message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_PREFERENCES_CHANGED, "", "", userId, nil)
 	message.Add("preferences", preferences.ToJson())
-	go a.Publish(message)
+	a.Go(func() {
+		a.Publish(message)
+	})
 
 	return nil
 }
@@ -78,7 +80,9 @@ func (a *App) DeletePreferences(userId string, preferences model.Preferences) *m
 
 	message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_PREFERENCES_DELETED, "", "", userId, nil)
 	message.Add("preferences", preferences.ToJson())
-	go a.Publish(message)
+	a.Go(func() {
+		a.Publish(message)
+	})
 
 	return nil
 }