Bug 337137: Use better default icon for search engines. r=beng

browser/themes/gnomestripe/browser/searchbar.css

@@ -4,7 +4,8 @@
 
 .searchbar-engine-image {
   margin: 0px 0px 0px 2px;
-  list-style-image: url("chrome://browser/skin/Search-bar.png");
+  list-style-image: url("chrome://global/skin/icons/folder-item.png");
+  -moz-image-region: rect(0px, 16px, 16px, 0px);
 }
 
 .search-go-button-container {