public void Refresh3()
{
OpenConnectionCorrect(conn);
dataGridView3.DataSource = RequestsSQLT.SelectAllFromBooking(conn);
ElementsSettings.SetDefaultSettingsToDGV(dataGridView3);
ElementsSettings.HideFirstXColumns(dataGridView3, 2);
ElementsSettings.HideLastXColumns(dataGridView3, 2);
ElementsSettings.RenameLivingOrBookingDGV(dataGridView3);
}