flectra/addons/sale_timesheet/views/product_views.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <record id="view_product_timesheet_form" model="ir.ui.view">
        <field name="name">product.template.timesheet.form</field>
        <field name="model">product.template</field>
        <field name="inherit_id" ref="sale.product_template_form_view_invoice_policy"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='invoice_policy']" position="attributes">
                <attribute name="invisible">False</attribute>
                <attribute name="attrs">{'invisible': [('type','==','service')]}</attribute>
            </xpath>
            <xpath expr="//field[@name='service_type']" position="after">
                <field name="service_policy" widget="radio" attrs="{'invisible': [('type','!=','service')]}"/>
                <field name="service_tracking" widget="radio" attrs="{'invisible': [('type','!=','service')]}"/>
                <field name="project_id" attrs="{'invisible':[('service_tracking','!=','task_global_project')], 'required':[('service_tracking','==','task_global_project')]}"
                />
            </xpath>
            <field name="service_type" position="after">
            </field>
        </field>
    </record>

    <record id="product_template_search_view_sale_timesheet" model="ir.ui.view">
        <field name="name">product.template.search.timesheet</field>
        <field name="model">product.template</field>
        <field name="inherit_id" ref="product.product_template_search_view"/>
        <field name="arch" type="xml">
            <xpath expr="//filter[@name='consumable']" position="after">
                <separator/>
                <filter string="Time-based services" name="product_time_based" domain="[('type', '=', 'service'), ('invoice_policy', '=', 'delivery'), ('service_type', '=', 'timesheet')]"/>
                <filter string="Fixed price services" name="product_service_fixed" domain="[('type', '=', 'service'), ('invoice_policy', '=', 'order'), ('service_type', '=', 'timesheet')]"/>
                <filter string="Milestone services" name="product_service_milestone" domain="[('type', '=', 'service'), ('invoice_policy', '=', 'delivery'), ('service_type', '=', 'manual')]"/>
            </xpath>
        </field>
    </record>

    <record id="product_template_action_time_based" model="ir.actions.act_window">
        <field name="name">Products</field>
        <field name="res_model">product.template</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree,form</field>
        <field name="context">{'search_default_product_time_based':1, 'default_type': 'service', 'default_invoice_policy': 'delivery', 'default_service_type': 'timesheet'}</field>
    </record>

    <record id="product_template_action_fixed" model="ir.actions.act_window">
        <field name="name">Products</field>
        <field name="res_model">product.template</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree,form</field>
        <field name="context">{'search_default_product_service_fixed':1, 'default_type': 'service', 'default_invoice_policy': 'order', 'default_service_type': 'timesheet'}</field>
    </record>

    <record id="product_template_action_milestone" model="ir.actions.act_window">
        <field name="name">Products</field>
        <field name="res_model">product.template</field>
        <field name="view_type">form</field>
        <field name="view_mode">tree,form</field>
        <field name="context">{'search_default_product_service_milestone':1, 'default_type': 'service', 'default_invoice_policy': 'delivery', 'default_service_type': 'manual'}</field>
    </record>

</flectra>