GUI: Fix deselecting the selected node mainly in the control tab

```
What steps will reproduce the problem?
1. Select Node
2. Change some value
3.

What is the expected output? What do you see instead?

    The GUI will deselect the selected node

Please use labels and text to provide additional information.

    Happens when sensorfetch is executed
```

Original issue reported on code.google.com by `peterdec...@gmail.com` on 23 May 2009 at 10:01
