Docstrings
Constants are defined in config.py
Use PLOMINO_RESOURCE_NAME from config; use os.path.join; some naming.
We're still ending up with plain Decimal instances

.. but they're easy to handle, so just do that.
Delete date serialization cruft
Merge remote branch 'origin/github-main' into jean-templatedb-tweaks
Merge pull request #471 from plomino/jean-reorder-validation

Bad condition: modal form for datagrid row editing not populated
Merge pull request #470 from plomino/jean-templatedb-tweaks

templatedb tweaks
Merge pull request #468 from plomino/jean-datetime-xmlrpc

Delete date serialization cruft
Merge pull request #467 from plomino/jean-decimal-xmlrpc

We're still ending up with plain Decimal instances
version 1.18.2
Another attempt to get BaseField.getFieldValue right for all cases