flectra/addons/crm/wizard/crm_lead_to_opportunity_views.xml

<?xml version="1.0"?>
<flectra>

        <record id="view_crm_lead2opportunity_partner" model="ir.ui.view">
            <field name="name">crm.lead2opportunity.partner.form</field>
            <field name="model">crm.lead2opportunity.partner</field>
            <field name="arch" type="xml">
                <form string="Convert to Opportunity">
                    <group name="name">
                        <field name="name" widget="radio"/>
                    </group>
                    <group string="Assign this opportunity to">
                        <field name="user_id" domain="[('share', '=', False)]"/>
                        <field name="team_id" widget="selection"/>
                    </group>
                    <group string="Opportunities" attrs="{'invisible': [('name', '!=', 'merge')]}">
                        <field name="opportunity_ids" nolabel="1">
                            <tree>
                                <field name="create_date"/>
                                <field name="name"/>
                                <field name="type"/>
                                <field name="contact_name"/>
                                <field name="country_id" invisible="context.get('invisible_country', True)"/>
                                <field name="email_from"/>
                                <field name="phone"/>
                                <field name="stage_id"/>
                                <field name="user_id"/>
                                <field name="team_id"/>
                            </tree>
                        </field>
                    </group>
                    <group name="action" attrs="{'invisible': [('name', '!=', 'convert')]}" string="Customers" col="1">
                        <field name="action" nolabel="1" widget="radio"/>
                        <group col="2">
                            <field name="partner_id" domain="[('customer', '=', True)]" context="{'search_default_customer': 1}" attrs="{'required': [('action', '=', 'exist')], 'invisible':[('action','!=','exist')]}"/>
                        </group>
                    </group>
                    <footer>
                        <button name="action_apply" string="Create Opportunity" type="object" class="btn-primary"/>
                        <button string="Cancel" class="btn-default" special="cancel"/>
                    </footer>
                </form>
            </field>
        </record>

        <record id="view_crm_lead2opportunity_partner_mass" model="ir.ui.view">
            <field name="name">crm.lead2opportunity.partner.mass.form</field>
            <field name="model">crm.lead2opportunity.partner.mass</field>
            <field name="arch" type="xml">
                <form string="Convert to Opportunity">
                    <separator string="Conversion Options"/>
                    <group>
                        <field name="name" class="oe_inline" widget="radio"/>
                        <field name="deduplicate" class="oe_inline"/>
                    </group>
                    <group string="Assign these opportunities to">
                        <field name="team_id"/>
                        <field name="user_ids" widget="many2many_tags" domain="[('share', '=', False)]"/>
                         <field name="force_assignation"/>
                    </group>
                    <label for="opportunity_ids" string="Leads with existing duplicates (for information)" help="Leads that you selected that have duplicates. If the list is empty, it means that no duplicates were found" attrs="{'invisible': [('deduplicate', '=', False)]}"/>
                    <group attrs="{'invisible': [('deduplicate', '=', False)]}">
                        <field name="opportunity_ids" colspan="4" nolabel="1" readonly="1">
                            <tree create="false" delete="false">
                                <field name="create_date"/>
                                <field name="name"/>
                                <field name="type"/>
                                <field name="contact_name"/>
                                <field name="country_id" invisible="context.get('invisible_country', True)"/>
                                <field name="email_from"/>
                                <field name="phone"/>
                                <field name="stage_id"/>
                                <field name="user_id"/>
                                <field name="team_id"/>
                            </tree>
                        </field>
                    </group>
                    <group attrs="{'invisible': [('name', '!=', 'convert')]}" string="Customers" col="1">
                        <field name="action" class="oe_inline" widget="radio"/>
                        <group col="2">
                            <field name="partner_id"
                                attrs="{'required': [('action', '=', 'exist')], 'invisible':[('action','!=','exist')]}"
                                class="oe_inline"/>
                        </group>
                    </group>
                    <footer>
                        <button name="mass_convert" string="Convert to Opportunities" type="object" class="btn-primary"/>
                        <button string="Cancel" class="btn-default" special="cancel"/>
                    </footer>
                </form>
            </field>
        </record>

        <record id="action_crm_lead2opportunity_partner" model="ir.actions.act_window">
            <field name="name">Convert to opportunity</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">crm.lead2opportunity.partner</field>
            <field name="view_mode">form</field>
            <field name="view_id" ref="view_crm_lead2opportunity_partner"/>
            <field name="target">new</field>
        </record>

        <act_window
            id="action_crm_send_mass_convert"
            multi="True"
            key2="client_action_multi" name="Convert to opportunities"
            res_model="crm.lead2opportunity.partner.mass" src_model="crm.lead"
            view_mode="form" target="new" view_type="form"
            context="{'mass_convert' : True}"
            view_id="view_crm_lead2opportunity_partner_mass"
            groups="sales_team.group_sale_salesman"
        />

</flectra>