46519, classic skin polish fixes, remove bottom border from internetresults tree. a=hyatt

themes/classic/communicator/search/win/internetresults.css

@@ -20,6 +20,7 @@
   {
     border-right          : none;
     border-left           : none;
+    border-bottom         : none;
   }  
   
 #internetresultstree > .tree-container-treerows