Ensure autogenerated docstrings and descriptions are standard compliant

Improve autogeneration of code such that docstrings and descriptions of persistent properties have the correct size.

E.g. this should give no errors on auto generated files:

/opt/project/src/micado# flake8 --docstring-convention google --max-line-length=120 --max-doc-length=80 | grep -v Extra | grep -v test | grep -v util | grep -v toolbox | grep -v Make | grep -v __init__ | grep -v Object