Bug #119344 --> add windows system tray icon for biff

r=bhuvan
sr=sspitzer

mailnews/base/resources/locale/en-US/messenger.properties

@@ -216,3 +216,8 @@ saveLabel=Save
 
 recipientSearchCriteria=Subject or Recipient contains:
 senderSearchCriteria=Subject or Sender contains:
+
+# LOCALIZATION NOTES(biffNotification): %1$S is a user name %2$S is the number of new messages %3S is the word "message" or "messages" 
+biffNotification=%1$S has %2$S new %3$S
+message=message
+messages=messages