598 - Single panel view black text bug

[Dreamer]

- use white as address bar text color (and black for background)
- press F10 to activate single-panel view
= address bar text color is black instead of white

- restart FC
= address bar text color is white (correct)

- press F10 twice
= address bar text color is black instead of white, again

[Marek]

Fixed for the release 599.