Translate approval_status

The label of "Approval status" select on backend page for reviews management isn't translated in all languages expect Russian. A sreenshot showing how it looks with Ukrainian translation:

![screenshot](http://i.imgur.com/9cObrpq.png)

I undestand English so-so and can barely read German, but I made an effort to translate this term to all present languages (not without help of smart machinery). Now I will tag people who submitted corresponding translation files or contributed to them and will ask if I, by happy accident, did a good job translating to their language. Sorry if I'll tag somebody by mistake or did a mistake in your language.

I omitted the word "status" intuitively, if not randomly. Please correct me if it feels right the other way.