Intro key to run next wizard step (popup or window)

I detected that when run a wizard inside the window (window at True), when press “Intro” key not run next wizard step (Button that the default is a True).

In case the wizard is a popup, when press “Intro” key run the next wizard step (Button that the default is a True).

Expected behavior? Bug?

Examples:

1- When press “Intro” key, NOT run next step (wizard window at True):

    <record model="ir.action.wizard" id="act_stock_picking_shipment_out">
        <field name="name">Shipment Out Picking</field>
        <field name="wiz_name">stock.picking.shipment.out</field>
        <field name="window" eval="True"/>
    </record>

2- When press “Intro” key, run next step (wizard window at False - popup wizard):

    <record model="ir.action.wizard" id="act_stock_picking_shipment_out">
        <field name="name">Shipment Out Picking</field>
        <field name="wiz_name">stock.picking.shipment.out</field>
        <field name="window" eval="False"/>
    </record>

This is the expected behavior see Issue 1806: Focus/Default for buttons on wizards is not working - Tryton issue tracker