Bug 40580: Add support for uk (ukranian) locale

note on the new unicode string in network-settings.js

Ukranian language in ukranian: Українська ( https://en.wiktionary.org/wiki/%D1%83%D0%BA%D1%80%D0%B0%D1%97%D0%BD%D1%81%D1%8C%D0%BA%D0%B0 )

to escaped unicode: "\u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u0430"