Add missing messages in en-GB (copied from en-US).

svncommit

2007-09-11 75f5340f0c63082046ae0e7720a935bfe76a1338

 program/localization/en_US/messages.inc

@@ -3,7 +3,7 @@
/*

 +-----------------------------------------------------------------------+
 | language/en/messages.inc                                              |
 | language/en_US/messages.inc                                           |
 |                                                                       |
 | Language file of the RoundCube Webmail client                         |
 | Copyright (C) 2005-2007, RoundCube Dev. - Switzerland                 |