Browsing Norwegian Bokmal translation

Translators: "Present Unless" is a column header of the text attributes panel
of the Orca preferences dialog. On this panel, the user can select a set of
text attributes that they would like spoken and/or indicated in braille.
Because the list of attributes could get quite lengthy, we provide the option
to always speak/braille a text attribute *unless* its value is equal to the
value given by the user in this column of the list. For example, given the
text attribute "underline" and a present unless value of "none", the user is
stating that he/she would like to have underlined text announced for all cases
(single, double, low, etc.) except when the value of underline is none (i.e.
when it's not underlined). "Present" here is being used as a verb.