Quick Entry dialog box is redirecting me to doctype edit page

I was using frappe develop branch to build my custom app. in that i used

 
    frappe.ui.form.on("CRM Task", {
    	refresh(frm) {
        },
    	after_save: function (frm) {
            // Override redirection after save
            if (frm.is_new()) {
                // Refresh or close the dialog if in quick entry
                if (frm.quick_entry) {
                    frm.quick_entry.close();
                }
            }
        }
    });

this stop redirecting which was good.
now i am working with frappe v-15 stable branch this code is not working there.
i am using

frappe.ui.form.on("CRM Task", {
    after_save: function(frm) {
        if (frm.is_quick_entry) {
            frappe.quick_entry_dialog.hide();
            frappe.show_alert({message: __("Saved successfully"), indicator: "green"});
        }
    }
});

both code are not working.

@NCP, @shariquerik Please help me to stop quick entry popup redirection in v-15

Anyone would like to answer my query.