BDL 2.41 new features

Features added in 2.41 releases of the Genero Business Development Language.

Table 1. User interface
Overview	Reference
The `datatypeHint` style attribute (for Edit item types) and `nativeLook` style attribute (for CheckBox item types) have been added for use by the Genero web client. Important: In 2.50, the `nativeLook` attribute is renamed `customWidget`.	See Edit style attributes and CheckBox style attributes.