Use new jQuery methods when adding, editing and deleting tags with AJAX, fix warning when deleting tags, see #10239

git-svn-id: https://develop.svn.wordpress.org/trunk@11676 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/js/common.dev.js

@@ -1,4 +1,4 @@
-var showNotice, adminMenu, columns;
+var showNotice, adminMenu, columns, validateForm;
 (function($){
 // sidebar admin menu
 adminMenu = {
@@ -122,6 +122,10 @@ columns = {
 
 $(document).ready(function(){columns.init();});
 
+validateForm = function( form ) {
+	return !$( form ).find('.form-required').filter( function() { return $('input:visible', this).val() == ''; } ).addClass( 'form-invalid' ).change( function() { $(this).removeClass( 'form-invalid' ); } ).size();
+}
+
 })(jQuery);
 
 // stub for doing better warnings