Fix bug 872107 - Filter review list by locale

Test URLs (currently all the same for all locales - this should fix that):

https://developer.mozilla.org/en-US/docs/needs-review/editorial
https://developer.mozilla.org/en-US/docs/needs-review/technical

https://developer.mozilla.org/de/docs/needs-review/editorial
https://developer.mozilla.org/de/docs/needs-review/technical