Better resetting of UTC hour plots
Currently we have a number of plots of something vs. UTC hour. These are refreshed every run. It would be nice if these could save their history across run boundaries since they are plotted vs. hour.
To avoid overprinting data that is 24 hours old, perhaps these histograms could be configured to have a "rolling clear". Eg. when the UTC hour rolls over to 19.01, before we fill the histogram, we clear all the data for hour [19-20).