Units in Combo Box - dimensionless elements get units

A more convenient workaround for this bug is IMHO to just use a pseudo unit like "rad" (which actually equals to 1) in the unit placeholder for the unit-less quantities.

If you don't like to see "rad" written when you edit the combo box (you would only see it there), you may also define a custom unit "unitless:=1" in front and use this instead of "rad".

BTW, other bugs in the combo box (apart from its inability to use combined units like m/s or N*m) are, that we are not allowed to insert the units via the unit drop down menu and that inserting Greek characters does not work using Ctrl-g.

So it gets quite cumbersome to insert units like Δ°C or kΩ. It can be done using copy and paste, though and given the implementation quality of the rest of the combo boxes I actually was surprised that units like °C (which are not simple factors but functions) actually seem to work correct once you succeed inserting them into the place holders.