So far this is done unconditionally. This already starts some of the
infrastructure for other gases, but so far only O2 is handled.
We also need a pressure scale on the right to make this useful - or we
need to do peek / trough pressure prints like we do for temperature and
depth.
Finally, I think I want to move the plot further down, maybe make the
whole plot area taller if we are plotting partial gas pressures as well.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix ugly printout, give colors proper names, make grid lines and alert
marker easier to see, and specify printer colors independently.
Signed-Off-By: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
