String change request for Gwibber

[Ken VanDine]

The notification settings in the Gwibber preferences dialog are very
confusing and many users do not get the results they expect.  This bug
has details and screenshots of both the current settings UI and the
proposed UI:

https://bugs.launchpad.net/bugs/621646

We are proposing 4 additional strings:

"Show notifications for"
"All messages"
"Mentions and replies only"
"Do not display notifications"


Thanks,
-- 
Ken VanDine
Ubuntu Desktop Integration Engineer
Cannonical, Ltd.