Use correct gender in the translations table on ManageTranslatorSandbox

Follow up to Ide09206b7af8a83230a70aa080c91311b25ea775 .
mw.user is incorrect, because we need the gender of
the user who made the translations and not of
the currently logged-in user.

Change-Id: I306143e858c8490664c4ff5cc5b91b4c0884232e
Merge "Use correct gender in the translations table on ManageTranslatorSandbox"