[Xfce-i18n] Orage plural forms

[Саша Петровић]

New string no. 279 should be in plural forms, please. (Txt:    Added %d 
alarms. Processed %d events.)
Old string no. 280 should be in plural forms (Txt:    Found %d alarms of 
which %d are active. (Searched %d recurring alarms.). But it is too 
complicated even for plural forms (multiple numbers).
Only solution is to separate sentences in 2 string for string no. 279 & 
3 strings for string no. 280. Sorry for worst English.