re #358.
re #358.

Rather than restricting all the <select>, we'll only restrict the list of languages of the translations and for adding a new sentence.

git-svn-id: 776ea4b3e47339c5b8782ec5e9346c740e073fb4@1854 e0e46c49-be69-4f5a-ad62-21024a331aea

hans/tatoeba2,hans/tatoeba2,hans/tatoeba2