Error comparing temperature units with offset

Hi,

In versiones newer than 11.4.1 the comparison of temperatures is incorrect between some temperature units when an offset is involved.

lowTemp = 9 degC;
highTemp = 10 degC;

lowTemp         < highTemp          # true
lowTemp to degF < highTemp          # false but should be true
lowTemp to K    < highTemp          # false but should be true
lowTemp to degR < highTemp          # false but should be true
lowTemp to K    < highTemp to degF  # false but should be true
lowTemp to degR < highTemp to degF  # false but should be true

This was discussed in #2518 but this might need to be a separate issue.