Don't reset the page selection if the results have changed while the user

was browsing exiting results

This is most noticeable when viewing results in xephyr, and then opening
a document in your regular session. But it could also be noticeable if
downloading a new file completes while the user is in the overlay.

This patch also moves the call to _displayMatchedItems() to _redisplay
instead of making it in both _setDefaultList() and _doSearchFilter().

js/ui/docDisplay.js

@@ -110,7 +110,7 @@ DocDisplay.prototype = {
             // but redisplaying right away is cool when we use Zephyr.
             // Also, we might be displaying remote documents, like Google Docs, in the future
             // which might be edited by someone else.
-            me._redisplay(); 
+            me._redisplay(false); 
         });
     },
 
@@ -163,8 +163,6 @@ DocDisplay.prototype = {
         }
 
         this._matchedItems.sort(Lang.bind(this, function (a,b) { return this._compareItems(a,b); }));
-
-        this._displayMatchedItems(true);
     },
 
     // Compares items associated with the item ids based on how recently the items