fix for #67677. on loading a folder, if there is no new messages

scroll to the top.  r=mscott, sr=bienvenu

mailnews/base/resources/content/msgMail3PaneWindow.js

@@ -145,7 +145,12 @@ var folderListener = {
                   if (!scrolled) {
                     // if we didn't just scroll, scroll to the first new message
                     // don't select it though
-				    ScrollToMessage(nsMsgNavigationType.firstNew, true, false /* selectMessage */);
+				    scrolled = ScrollToMessage(nsMsgNavigationType.firstNew, true, false /* selectMessage */);
+                    
+                    // if we failed to find a new message, scroll to the top
+                    if (!scrolled) {
+                      EnsureRowInThreadOutlinerIsVisible(0);
+                    }
                   }
 
 				  if(showPerformance) {

mailnews/base/resources/content/msgViewNavigation.js

@@ -164,7 +164,6 @@ function CrossFolderNavigation(type, supportsFolderPane )
 
 function ScrollToMessage(type, wrap, selectMessage)
 {
-  dump("XXX ScrollToMessage " + type + "," + selectMessage + "\n");
   try {
     var outlinerView = gDBView.QueryInterface(Components.interfaces.nsIOutlinerView);
     var outlinerSelection = outlinerView.selection;