It's not a lot of messages, but this is a very common and basic extension,
and it's often one of the first to be translated, so it's good to make its
translation easier.
To be committed together with the corresponding
translatewiki configuration change:
I33ca817b457abc5504917745c2730ec223e263e0
Change-Id: I13ea351553319583051778cfb6c55f843b5f86e5
