<odoo>
    <record id="project_milestone_tree_action" model="ir.actions.act_window">
        <field name="name">Milestones</field>
        <field name="res_model">project.milestone</field>
        <field name="view_mode">tree,form</field>
    </record>
    <menuitem
        id="project_menu_config_milestone"
        action="project_milestone_tree_action"
        parent="project.menu_project_config"
    />
</odoo>
