private void listViewCurves_SelectedIndexChanged(object sender, EventArgs e)
{
buttonEditCurve.Enabled = (listViewCurves.SelectedIndices.Count == 1);
buttonDeleteCurve.Enabled = (listViewCurves.SelectedIndices.Count == 1);
buttonEditCurve.ForeColor = buttonEditCurve.Enabled ? ThemeColorTable.ForeColor : ThemeColorTable.ForeColorDisabled;
buttonDeleteCurve.ForeColor = buttonDeleteCurve.Enabled ? ThemeColorTable.ForeColor : ThemeColorTable.ForeColorDisabled;
}