Re #5896. Remove calls to deprecated method that does nothing.
Re #5896. First try at adding a live button to the DGS reduction GUI.

Uses some nasty tricks at the moment, which should go away as things
are generalised for this to be a feature of the whole reduction framework.
Re #5896. Uncomment the live listener address for HYSPEC.
Merge branch 'feature/5896_reduction_gui_live' into develop