Added custom 404 display and login redirect

ref-test/admin/static/js/script.js

@@ -27,7 +27,12 @@ $('form.form-post').submit(function(event) {
         data: data,
         dataType: 'json',
         success: function(response) {
-            window.location.href = rel_success;
+            if (response.redirect_to) {
+                window.location.href = response.redirect_to;
+            }
+            else {
+                window.location.href = rel_success;
+            }
         },
         error: function(response) {
             error_response(response);