SCUBA2: add noise and NEFD calculation + POD updates

For some reason the noise and NEFD calculations had been left out of
this recipe.

POD updates for upcoming Starlink release.

Remove display as unlikely to be useful.
SCUBA2: update POD for upcoming Starlink release
SCUBA2: update POD in pointing recipes for upcoming Starlink release
SCUBA2: add noise calculation for Frame images

For some reason the noise was not being calculated and logged for the
individual Frame images. It is undoubtedly true that users would like
to know the noise level in these images as well as the final coadd(s).
SCUBA2: run source finder with a 4-sigma cutoff for faint sources
SCUBA2: update POD, remove display of group image

Most of the analysis of the output from this recipe will take place
offline so there is no real need to display the results.
SCUBA2: update POD for upcoming Starlink release