Cookie pys_advanced_form_data

Hi,

Accidentally I have discovered that your plugin creates cookie with name pys_advanced_form_data, which contains first name, last name, email and phone number of the user. Everything stored as a plain text.

In my opinion it is dangerous behaviour, because it exposes personal data in a widely accessible cookie (and can be logged by proxy mechanisms etc.)

Also it can lead to invalid attribution of events on shared computers.