Bug 524090 - make "View Image Info" scroll to the selected image in the Page Info media tab. r=dao

browser/base/content/pageinfo/pageInfo.js

@@ -1179,6 +1179,8 @@ function selectImage() {
   for (var i = 0; i < tree.view.rowCount; i++) {
     if (gImageElement == gImageView.data[i][COL_IMAGE_NODE]) {
       tree.view.selection.select(i);
+      tree.treeBoxObject.ensureRowIsVisible(i);
+      tree.focus();
       return;
     }
   }