web_tree_date_search/views/search.xml

<?xml version="1.0" encoding="UTF-8"?>
<templates id="template" xml:space="preserve">
  <t t-name="TreeDateSearch">
    <div class="ui-toolbar" style="margin-bottom:0px;">
    </div>
  </t>

  <t t-name="TreeDateSearchField">
    <div class='oe_form_dropdown_section' style="min-width: 208px; margin-left:4px;">
          <h4><t t-esc="field_name"/> :</h4>
          <div class='oe_form' style='margin-right:3px; display: inline;' >
              <span/>
          </div>
          <div class='oe_form' style='margin-left:3px; display: inline; float: right;' >
              <span/>
          </div>
    </div>
  </t>
</templates>