defined a search view fro my module and declared its id in search_view_id in the menu creation.

everything seems to be correct but the search view is not properly displayed. It is displayed below the tree view.

  <record id="open_search_form" model="ir.actions.act_window">
            <field name="name">Users</field>
            <field name="res_model">general.users</field>
            <field name="view_type">tree</field>
            <field name="view_mode">tree,search</field>
            <field name="domain">[]</field>
            <field name="context">{}</field>
            <field name="search_view_id" ref="general_search_view"/>
  </record>