Comment 2 for bug 862154

> patch the po to avoid creating an un-translated string, not sure how to do that easily though...

You could use msgcat to combine nautilus and gnome-control-center's po files and then re-run intltool-update to sort out the unneeded ones. However, for clean and small patches it's better to just copy&paste them from e. g. nautilus' po files. Something like

cd gnome-control-center/po
for f in ~/upstream/nautilus/po/*.po; echo >> `basename $f`; do echo grep -A 1 'msgid "Never"' $f >> `basename $f`; done