Fixes logout confirmation dialog.

lang/main.json

         "AuthMsg": "Authentication is required to create room:<br/><b>__room__ </b></br> You can either authenticate to create the room or just wait for someone else to do so.",
         "Authenticate": "Authenticate",
         "Cancel": "Cancel",
+        "logoutTitle" : "Logout",
+        "logoutQuestion" : "Are you sure you want to logout and stop the conference ?",
         "sessTerminated": "Session Terminated",
         "hungUp": "You hung up the call",
         "joinAgain": "Join again",

modules/UI/toolbars/Toolbar.js

     "toolbar_button_logout": function () {
         // Ask for confirmation
         messageHandler.openTwoButtonDialog(
-            "Logout",
+            "dialog.logoutTitle", "Logout",
+            "dialog.logoutQuestion",
             "Are you sure you want to logout and stop the conference ?",
             false, "Yes",
             function (evt, yes) {