private void buttonMoveDown_Click(object sender, EventArgs e)
{
int index = this.listBoxScripts.SelectedIndex;
if (index >= 0 && index < this.listBoxScripts.Items.Count - 1)
{
Script script = Project.ScriptManager.Scripts[index];
this._scripts.RemoveAt(index);
this._scripts.Insert(index + 1, script);
this.listBoxScripts.SelectedIndex = index + 1;
}
}