Cannot load non-ascii flow pages via api

This is a temporary fix which will only be deployed to 1.24wmf19
to allow the new deployment on hewiki and frwiki to test the
respective pages.

Best guess is the javascript is double encoding the api requests,
a patch for that will be incoming.

Change-Id: Ib9aa3a6ce9b8900d449a7fc15508a11dfbc67b9a