[Xfce-i18n] Can't find some strings in Ristretto

[Klemen Košir]

Hello!

I'm currently translating Ristretto to Slovenian and I came across some 
string regarding the icon bar and color of active and cursor items, but 
I can't seem to find them in the application itself.
Does anyone knows where can I find these strings, so I can translate 
them correctly?

The strings are:
- Icon Bar Model
- Active item fill color
- Orientation of the iconbar
- File Column

Regards,
Klemen Košir