<group id="Operations">
<feature id="Part" title="New part" tooltip="Create a new part" icon=":pictures/part_ico.png"/>
<feature id="Duplicate" title="Duplicate"
<group id="Operations">
<feature id="Part" title="New part" tooltip="Create a new part" icon=":pictures/part_ico.png"/>
<feature id="Duplicate" title="Duplicate"