Fix hide untranslated

[yakky]

Fix hide untranslated in menu
Fix #3472

[coveralls]

Coverage decreased (-0.1%) to 87.161% when pulling ad0e9e3 on yakky:feature/fix_menu_hide_untranslated into 4fa3ff3 on divio:develop.

[yakky]

@digi604 @mkoistinen please check this change.
Tests runs and lives tests are ok, but it's the kind of small change that can have unintended consequences

[mkoistinen]

The change and the test look good to me.

It pretty hard to test for "unintended consequences" though, ideally, our
collection of tests should have already done this. I'll install this
version into my latest projects and keep an eye on things.

[yakky]

Strangely enough there was no test coverage for this case.
I coded the obvious one, but probably more eyeballs will come up with better tests for this

[digi604]

lgtm

[digi604]

probably a leftover from the language independent publishing