void view_ClientDeleted(object sender, EventArgs e)
        {
            ClientEventArgs clientEvArgs    = (ClientEventArgs)e;
            Client          removableClient = clientEvArgs.client;
            Group           selGr           = view.Group;

            clientManager.RemoveClient(removableClient);

            view.DisplayGroups(groupManager.GetGroups());

            view.SelectGroup(selGr);

            view.RefreshForm();
        }