Feature preview displays outdated attribute values

[uclaros]

The preview drawer may display outdated values after a feature has been modified.

Steps to reproduce:

1. Create a project in the app
2. Add a point
3. Set it's Notes attribute to a
4. Click Check, then click on the feature on the map
5. Preview shows correct value
6. Click Edit, change Notes value to asdf
7. Click Check, then click on the feature on the map
8. If correct value is shown, click edit and goto 3

After a couple of changes the displayed value is the old one: Drawer title will correctly display asdf while Notes row will display a