private void mediçãoToolStripMenuItem3_Click(object sender, EventArgs e)
        {
            Form frm = new CadastroGrupoMedicao(null);

            frm.ShowDialog();
        }
        private void button4_Click(object sender, EventArgs e)
        {
            Form frm = new CadastroGrupoMedicao(this);

            frm.ShowDialog();
        }