Remove the objects from the session while JSONify the objects, sent to

the server.

Also - set width of the select2 container to 100% under backgrid.

web/pgadmin/browser/templates/browser/js/node.js

@@ -1484,6 +1484,8 @@ function($, _, S, pgAdmin, Menu, Backbone, Alertify, Backform) {
                   if (obj && method && method == 'GET') {
                     res[k] = JSON.stringify(res[k]);
                   }
+                } else {
+                  delete res[k];
                 }
               } else {
                 res[k] = (obj && obj.toJSON());