Add flashing display for anomalies

[linguini1]

If an altitude/pressure, etc. measurement is beyond the acceptable range for our test conditions, there should be some kind of warning indication on the graphs as well as on the main page.

Ideally, a graph will have some sort of red/warning colour for the text or display when measurements are bad that is easy to notice.

A CSS class should be created for the dashboard panels to make the edges glow red when one or more measurements are anomalous.