lib/: Fill in some missing translations from existing similar
translations.
lib/de.po,lib/de_CH.po: Move menu accelerator on "Farbschlüssel"
from "ü" to "F", since the latter isn't used in that menu.
lib/: Various translation updates.
lib/extract-msgs.pl: Fix to handle there being a comment before the
comment with the message in.
src/printwx.cc: Fix incorrect message in comment.
lib/: Update pot and po files with current linenumber references.