Fixes for various sidebar panels for bug # 42718. Also, set page title for FTP/FILE displays. Finally, fix a bug (can't remember the bug # at the moment) with clicking on the scrollbar... basically, make sure the click is on a <treeitem> before processing the click. r=me

suite/browser/navigator.js

@@ -1608,6 +1608,7 @@ function checkForDirectoryListing() {
          !window._content.HTTPIndex.constructor ) {
         // Give directory .xul/.js access to browser instance.
         window._content.defaultCharacterset = appCore.GetDocumentCharset();
+        window._content.parentWindow = window;
     }
 }