app-odoo/app_account_superbar/views/account_account_views.xml

<odoo>
  <data>
      <!-- account.account -->
      <record id="view_account_search_superbar" model="ir.ui.view">
          <field name="name">account.account.search.superbar</field>
          <field name="model">account.account</field>
          <field name="inherit_id" ref="account.view_account_search"/>
          <field name="arch" type="xml">
              <xpath expr="//search/searchpanel" position="inside">
	              <field name="account_type"/>
              </xpath>
              <xpath expr="//search/searchpanel" position="attributes">
	              <attribute name="class"/>
              </xpath>
          </field>
      </record>
  </data>
</odoo>