server-tools/external_file_location/views/attachment_view.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>

        <record id="view_attachment_improved_form" model="ir.ui.view">
            <field name="model">ir.attachment.metadata</field>
            <field name="inherit_id" ref="attachment_metadata.view_attachment_improved_form" />
            <field name="arch" type="xml">
                <field name="url" position="after">
                    <field name="sync_date"/>
                    <field name="state"/>
                    <field name="state_message"/>
                    <field name="task_id"/>
                    <field name="location_id"/>
                </field>
            </field>
        </record>

        <record id="view_external_attachment_tree" model="ir.ui.view">
            <field name="model">ir.attachment.metadata</field>
            <field name="inherit_id" ref="attachment_metadata.view_external_attachment_tree" />
            <field name="arch" type="xml">
                <field name="file_type" position="after">
                    <field name="task_id"/>
                    <field name="location_id"/>
                    <field name="type"/>
                    <field name="create_date"/>
                    <field name="state"/>
                </field>
            </field>
        </record>

        <record id="view_external_attachment_search" model="ir.ui.view">
            <field name="model">ir.attachment.metadata</field>
            <field name="inherit_id" ref="attachment_metadata.view_external_attachment_search" />
            <field name="arch" type="xml">
                <field name="type" position="after">
                    <filter string="Pending" domain="[('state', '=', 'pending')]"/>
                    <filter string="Failed" domain="[('state', '=', 'failed')]"/>
                    <filter string="Done" domain="[('state', '=', 'done')]"/>
                </field>
                <filter string="Creation Month" position="after">
                    <filter string="State" domain="[]"
                        context="{'group_by': 'state'}"/>
                </filter>                
            </field>
        </record>

    </data>
</openerp>