Fix escaping when requesting projects
Fix escaping when requesting projects

Was causing an issue if locale name contained non-ASCII characters,
e.g. Norwegian Bokmål.

participedia/pontoon,mastizada/pontoon,mozilla/pontoon,mathjazz/pontoon,mastizada/pontoon,mozilla/pontoon,mastizada/pontoon,mastizada/pontoon,mathjazz/pontoon,mathjazz/pontoon,participedia/pontoon,participedia/pontoon,mozilla/pontoon,jotes/pontoon,mathjazz/pontoon,jotes/pontoon,mozilla/pontoon,mathjazz/pontoon,jotes/pontoon,participedia/pontoon,mozilla/pontoon,jotes/pontoon