Show the original string also when the translation is empty.
Show the original string also when the translation is empty.

Currently the original (English) string is used when a particular
translation is not found. However, when a language file is updated or
generated by the make_language.rb script all strings are empty strings.
This patch facilitates running with a partially translated language file
without worrying about disappearing text.

Signed-off-by: Frédéric de Villamil <58692fd42329d32571d999fbcdd2ddd08a5186db@de-villamil.com>
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