port fix from trunk

mail/base/locale/messenger.dtd

@@ -28,7 +28,8 @@
 <!ENTITY getNewMsgForCmd.accesskey "w">
 <!ENTITY getAllNewMsgCmd.label "Get All New Messages">
 <!ENTITY getAllNewMsgCmd.key "t">
-<!ENTITY getNextNMsgCmd.label "Get Next 500 News Messages">
+<!ENTITY getNextNMsgCmd.label "Get Next 500 News Messages">
+<!ENTITY getNextNMsgCmd.accesskey "t">
 <!ENTITY sendUnsentCmd.label "Send Unsent Messages">
 <!ENTITY sendUnsentCmd.accesskey "d">
 <!ENTITY loadFirstDraft.label			"Load First Draft Message">