tton group.  Html content is allowed.</p>
    <p><strong>Appearance:</strong><br/>
    Specify whether the shape of the widget should be rectangular or have rounded corners.</p>
    <p><strong>Use theme colors:</strong><br/>
    Specify whether the theme colors should be used. If not active, custom colors can be specified for each option separately.</p>
    <p><strong>Passthrough:</strong><br/>
    Specify whether input messages should be passed through as output messages
    </p>
    <p><strong>Options:</s