[Mantisbt-lang] All langfiles need update due to bug fixed

[Alexey C. <al...@ch...>]

Hi guys,

I've split Sponsor string to 'sponsor' and 'sponsor_verb' to allow different
translation of noun and verb form (e.g. button and table headings).
Langfiles in cvs are updated.

Please update your translations.

Alexey Chumakov