Do not use i18n() in global C-like variables

If you use i18n() in stuff that gets called before the main KComponentData is created bad stuff happens [1] (and you were getting a warning about it for ages). This fixes it by using I18N_NOOP and then using i18n over it.

[1] http://comments.gmane.org/gmane.comp.kde.devel.internationalization-and-documentation/24240

Acked by Matěj Laitl

REVIEW: 105408