Add missing messages for gpg4win-tools

* src/addin-options.cpp (i18n_noops): Add some strings.

I found the missing strings by extracting messages in gpg4win-tools,
merging them with po/de.po, and then looking for fuzzys, i.e.
cd .../gpg4win-tools
xgettext -k_ $(find . -name \*.cpp) -o gpg4win-tools.pot
msgmerge .../gpgol/po/de.po .../gpg4win-tools/gpg4win-tools.pot \

> gpg4win-tools.po