Correct refreshing of vehicle menu

This PR fixes the bug with horizontal vehicle menu.

How to reproduce the bug:
1) Set interface option for using horizontal vehicle menu
2) Rename vehicle
As result, window 'w_stat' disappears:
![blank](https://f.cloud.github.com/assets/5421954/2429297/6576da5e-ac77-11e3-97ae-a13072035d81.png)