Steps to Reproduce

<zk>
    <toolbar>
        <toolbarbutton iconSclass="z-icon-home" label="button"/>
        <combobutton iconSclass="z-icon-home" label="button" mold="toolbar"/>
    </toolbar>
</zk>

Current Result

combobutton has a border

Expected Result

combobutton shouldn't have a border since toolbar mold is applied.

Debug Information

ZK-4391 side effect.
To make the border radius modified by inputgroup.

Workaround