Never mind; I’ve figured it out.
To help others, by entering “suffix: mm” in the “unit” field gave me the result I wanted (i.e like it was in the old version).
Why I have to do this is beyond me since the result of the database query is in mm.
To be clear, the actual “Unit of measure” here IS NOT millimetre; it is metre. The ‘milli’ prefix is a multiplier, meaning one thousandth of a metre.
So, if I specify mm as a “Unit of measure”, this is EXACTLY how I want it displayed; fractional or not.
Same goes for Kilogram (Kg). If I want weights specified in grams, that is what I would select.
My micrometers, dial gauges and vernier caliper specify their resolution as 0.02mm; NOT 20um.
You may as well get rid of all the options in the “unit” drop down and just have the suffix: command to specify the units.
Adding new features should not break old ones. I can just imagine the frustration people would feel having to spend hours modifying their existing dashboards after upgrading, because of someone’s thought bubble.