<filter string="Unassigned" name="unassigned" domain="[('user_id','=',False)]"/>
<separator/>
<filter string="New" name="new" domain="[('stage_id.sequence', '<=', 1)]"/>
<group expand="1" string="Group By">
<filter string="Assigned to" name="Responsible" context="{'group_by':'user_id'}" />
<filter string="Project" name="project" context="{'group_by':'project_id'}" />
<filter string="Unassigned" name="unassigned" domain="[('user_id','=',False)]"/>
<separator/>
<filter string="New" name="new" domain="[('stage_id.sequence', '<=', 1)]"/>
<group expand="1" string="Group By">
<filter string="Assigned to" name="Responsible" context="{'group_by':'user_id'}" />
<filter string="Project" name="project" context="{'group_by':'project_id'}" />