unlock / lock the M Squared etalon upon wavelength change

[mvbnano]

This should be done. I don't think we need to worry about resonator tuning or anything else as we do not have a wavemeter attached.

[mvbnano]

The specific command required for this will be in the TCP JSON protocol document available on Eevee at qmappfiles/reference/lasers/m_squared/Solstis_3_TCP_JSON_protocol_V21.pdf