picking_priority_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>
    <record model="ir.ui.view" id="stock_picking_form">
      <field name="name">stock.picking.form priority</field>
      <field name="model">stock.picking</field>
      <field name="inherit_id" ref="stock.view_picking_form"/>
      <field name="arch" type="xml">
        <field name="date_done" position="after">
          <field name="priority"/>
        </field>
      </field>
    </record>
    <record model="ir.ui.view" id="stock_picking_out_form">
      <field name="name">stock.picking.out.form priority</field>
      <field name="model">stock.picking.out</field>
      <field name="inherit_id" ref="stock.view_picking_form"/>
      <field name="arch" type="xml">
        <field name="date_done" position="after">
          <field name="priority"/>
        </field>
      </field>
    </record>

    <act_window id="action_retry_assign"
                name="Recompute Picking Availability"
                res_model="stock.picking.retry.availability"
                view_type="form"
                view_mode="form"
                target="new"
                />

    <menuitem id="menu_retry_availability"
              parent="procurement.menu_stock_sched"
              sequence="40"
              action="action_retry_assign"
              groups="stock.group_stock_user,stock.group_stock_manager"
              />

    <record model="ir.ui.view" id="picking_retry_availability_form">
      <field name="name">stock.picking.retry.availability form</field>
      <field name="model">stock.picking.retry.availability</field>
      <field name="arch" type="xml">
        <form string="Recompute Picking Availability" version="7.0">
          <group>
            <p class="oe_grey">
              This action will recompute the availability of the pickings based on their priority. Before running it, make sure that you have changed the priority of at least one picking.
            </p>
          </group>
          <footer>
            <button name="action_retry_assign" string="Recompute Availability" type="object"
                    class="oe_highlight"/>
            or
            <button string="Cancel" class="oe_link" special="cancel" />
          </footer>
        </form>
      </field>
    </record>

  </data>
</openerp>