private void butAddTask_Click(object sender, RoutedEventArgs e)
{
Task t = new Task();
DialogAddTask d = new DialogAddTask(t);
if (d.ShowDialog() == true)
{
//repaint all
DatabaseTask.CreateNewTask(t.text, t.prio, Status.TODO, t.startdate, t.deadline, TaskFolder);
Repaint();
}
else
{
}
}
