core_ui modules not found with DART v1418+

ptd.simulation() is returning an error with DART v1418+

AttributeError: module 'pytools4dart.core_ui' has no attribute 'atmosphere'
...
raise ImportError("Pytools4dart seems wrongly configured. Re-configure with pytools4dart.configure.")

This is due to xds schema in which contains none unicode escapes were introduced at the end of documentation strings, example in coeff_diff.xsd:

<xsd:documentation xml:lang = "en" source="attribut"> Violaxanthin-to-Zeaxanthin transformation status [0-1]\: 0\</xsd:documentation>