/// <summary>
        /// Invokes if the 'Edit -> Edit Contraints'-option in the menu strip was clicked.
        ///
        /// This will open the corresponding dialog for editing the contraints of the current
        /// variability model.
        /// </summary>
        /// <param name="sender">Sender</param>
        /// <param name="e">Event</param>
        private void editConstraintsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            EditContraintsDialog form = new EditContraintsDialog();

            form.Show();

            dataSaved = false;
        }
        /// <summary>
        /// Invokes if the 'Edit -> Edit Contraints'-option in the menu strip was clicked.
        /// 
        /// This will open the corresponding dialog for editing the contraints of the current
        /// variability model.
        /// </summary>
        /// <param name="sender">Sender</param>
        /// <param name="e">Event</param>
        private void editConstraintsToolStripMenuItem_Click(object sender, EventArgs e)
        {
            EditContraintsDialog form = new EditContraintsDialog();
            form.Show();

            dataSaved = false;
        }