i18n(sr_SR): add Serbian (Latin) translation

UI/SOGoUI/SOGoFolderAdvisory.h

@@ -173,6 +173,18 @@
 @interface SOGoFolderRussianRemovalAdvisory : SOGoFolderRemovalAdvisory
 @end
 
+@interface SOGoFolderSerbianAdditionAdvisory : SOGoFolderAdditionAdvisory
+@end
+
+@interface SOGoFolderSerbianRemovalAdvisory : SOGoFolderRemovalAdvisory
+@end
+
+@interface SOGoFolderSerbianLatinAdditionAdvisory : SOGoFolderAdditionAdvisory
+@end
+
+@interface SOGoFolderSerbianLatinRemovalAdvisory : SOGoFolderRemovalAdvisory
+@end
+
 @interface SOGoFolderSpanishSpainAdditionAdvisory : SOGoFolderAdditionAdvisory
 @end
 

UI/SOGoUI/SOGoFolderAdvisory.m

@@ -345,6 +345,18 @@
 @implementation SOGoFolderRussianRemovalAdvisory
 @end
 
+@implementation SOGoFolderSerbianAdditionAdvisory
+@end
+
+@implementation SOGoFolderSerbianRemovalAdvisory
+@end
+
+@implementation SOGoFolderSerbianLatinAdditionAdvisory
+@end
+
+@implementation SOGoFolderSerbianLatinRemovalAdvisory
+@end
+
 @implementation SOGoFolderSpanishSpainAdditionAdvisory
 @end