Feature request: formatting of PV values as fixed-format or scientific numbers

[mducle]

At the moment the formatting of the PV values in the WebDashboard is a bit haphazardous (also it seems that some PVs return String for numeric values and some return Numbers making it even more confusing). For example on MARI, the Fermi_speed is given in scientific notation but is always an integer less than 1000 so would be more readable displayed as an integer, whilst the Tank_Pressure is displayed in fixed-format but is usually a very small number (around 1e-5) when the instrument is running so would be better displayed using scientific notation.

Could these numbers be formatted so that very large (e.g. greater than 10000) and very small (less than 0.001) values be shown in scientific notation whilst everything else is in fixed-format?

[Tom-Willemsen]

For comparison, here are the unit tests for the numeric formatting in the IBEX GUI..

I think a good way to approach this ticket would be to port-in those unit tests, then match the behaviour of the GUI as closely as possible.

[mducle]

@Tom-Willemsen Ok. I'll look into that code.

[Tom-Willemsen]

Fixed by #79