add localization support support for "Direct messages with" raw string

js/twister_directmsg.js

@@ -185,7 +185,7 @@ function openDmWithUserModal(dm_screenname)
     $( retweetContent ).clone().appendTo( ".directMessages .modal-content" ).hide().fadeIn( "fast" );
 
     var dmTitle = $( ".directMessages h3" );
-    dmTitle.html("Direct messages with <span></span>");
+    dmTitle.html(polyglot.t("Direct messages with") + " <span></span>");
     dmTitle = dmTitle.find("span");
     var dmConversation = $(".directMessages");
     openDmConversation(dm_screenname, dmTitle, dmConversation);