SelectBox value translation can be disabled

To prevent SelectBox values from being translated, we had to disable entire translator from this control and translate label and option-descript manualy. 

I propose an opposite aproach - possibility to not translate these values =)
That was my first shot, but what about it's setter? From the name `translateValues()` I would guess that that method will return translated values and not just set a flag. Also logic of such method might be confusing (inverted)... What do you think?