[ #316294 ] Event handling: ev:target doesn't work correctly across XBL boundaries

gistfile1.xml

<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
            xmlns:xforms="http://www.w3.org/2002/xforms"
            xmlns:xxforms="http://orbeon.org/oxf/xml/xforms"
            xmlns:ev="http://www.w3.org/2001/xml-events"
            xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
            xmlns:xbl="http://www.w3.org/ns/xbl"
            xmlns:xxbl="http://orbeon.org/oxf/xml/xbl">
    <xhtml:head>
        <xforms:model id="model">
            <xforms:instance id="instance">
                <instance>Foo</instance>
            </xforms:instance>
        </xforms:model>
    </xhtml:head>
    <xhtml:body>

        <xforms:message ev:target="my-input" ev:event="DOMActivate" value="'Foo'"/>

        <fr:grid>
            <xhtml:tr>
                <xhtml:td>

                    <fr:grid>
                        <xhtml:tr>
                            <xhtml:td>
                                <xforms:input id="my-input" ref="."/>
                            </xhtml:td>
                        </xhtml:tr>
                    </fr:grid>

                </xhtml:td>
            </xhtml:tr>
        </fr:grid>

    </xhtml:body>
</xhtml:html>