fix opening folder in new mail window regression r=naving, sr=sspitzer, a=asa 133484

mailnews/base/public/nsIMessengerWindowService.idl

@@ -44,6 +44,6 @@ interface nsIMessengerWindowService : nsISupports {
        aFolderURI --> the folder resource you want pre-selected (if any)
 	   aMsgKey --> a particular message you may want selected in that folder (if any)
 	*/ 
-	void OpenMessengerWindowWithUri(in string aWindowType, in string aFolderURI, in nsMsgKey aMsgKey);
+	void openMessengerWindowWithUri(in string aWindowType, in string aFolderURI, in nsMsgKey aMsgKey);
 };
 

mailnews/base/resources/content/mailWindowOverlay.js

@@ -963,7 +963,7 @@ function MsgOpenNewWindowForFolder(uri, key)
    // get the messenger window open service and ask it to open a new window for us
    var mailWindowService = Components.classes["@mozilla.org/messenger/windowservice;1"].getService(Components.interfaces.nsIMessengerWindowService);
    if (mailWindowService)
-     mailWindowService.openMessengerWindowWithUri(uriToOpen, keyToSelect);
+     mailWindowService.openMessengerWindowWithUri("mail:3pane", uriToOpen, keyToSelect);
   }
 }