First step of data reorganisation : session is meant to disappear : a "session" is in fact a project and one project owns several cuttings, one per user. WARNING : this commit builds without problems but we can not open more than one UserPanel.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace FingersDance.Control.Menu
{
    [Serializable]
    public class Menu
    {
        public List<Item> Items = new List<Item>();
    }
}