More centroid_dashboard tweaks

[jeanconn]

Description

A collection of fiddly little commits to: reduce extra processing, reduce skips or error-out observations, update page html to avoid reflows.

Testing

• Passes unit tests on linux
• Functional testing

For functional testing, have just run a bunch of year 2020 with centroid dashboard code. It is still filling in

https://icxc.cfa.harvard.edu/aspect/centroid_reports

Fixes #

[jeanconn]

This isn't needed for shiny, I just had it lingering.

[taldcroft]

Excellent! One small request while you are at it is to change the y-axis label on the delta roll plot from dr (arcsec) to Roll error (arcsec) or (if that doesn't fit) Roll err (arcsec). dr is ambiguous.

[taldcroft]

Another feature request - CCD temperature. This could be put in the Roll error plot window as a right-side axis.

[taldcroft]

In the Performance details page, can you change Ending roll error to be "Not available" for ER's instead of 0.0? Not a huge deal but the 0.0 is wrong.

[taldcroft]

Can you put the Catalog and Visualization box on the right side in a 3rd column? This would optimize for modern wide screens and let me see nearly the entire page at once when flipping through.

[jeanconn]

I'm going to merge this and take those little RFEs and do them in a new PR. Thanks @taldcroft !