Remove full stop from 'echo-new-messages' message

It should not have a full stop – it's used in the personal menu
(top-right corner of pages), which additionally some skins like
Monobook display in all lowercase.

Updated qqq.

Change-Id: I224a9fc0226ac769eb878cc5d3a7e6d8ebfa7548
(cherry picked from commit 0d39b70b4546d92d1c85764516e3bfa12463be2f)