Gets or sets the enabled state of a specified field, also known as "grayed".
true - enabled; false - not enabled; ! - the enabled state is inverted (the opposite).
NOTE: A disabled element cannot be selected by clicking the element (or by pressing the TAB key even if this option is supported by the operating system).
NOTE: A label or button element will not disable if the "displayType" design time property for a field is set to HTML_AREA.
NOTE: The disabled "grayed" color is dependent on the LAF set in the Servoy Client Application Preferences. For more information see Preferences: Look And Feel in the Servoy Developer User's Guide.