Any clue how to modify below div to include by inharitance following <li> tag?
<li><a href="#" class="field-selection" t-att-data-field-id="field.id" t-att-data-id="header_id"
t-att-data-interval="'hour'">Hour</a></li> :
<div t-name="field_selection" class="dropdown">
<span class="btn btn-default field-selection dropdown-toggle" data-toggle="dropdown"></span>
<ul class="dropdown-menu multi-level" role="menu">
<t t-foreach="fields" t-as="field">
<t t-if="(field.type === 'date') || (field.type === 'datetime')">
<li class="graph-dropdown-submenu">
<a class="field-selection" t-att-data-field-id="field.id" t-att-data-id="header_id" t-att-
data-interval="'month'" href="#">
<t t-esc="field.value"/>
</a>
<ul class="dropdown-menu">
<li><a href="#" class="field-selection" t-att-data-field-id="field.id" t-att-data-
id="header_id" t-att-data-interval="'day'">Day</a></li>
<li><a href="#" class="field-selection" t-att-data-field-id="field.id" t-att-data-
id="header_id" t-att-data-interval="'week'">Week</a></li>
<li><a href="#" class="field-selection" t-att-data-field-id="field.id" t-att-data-
id="header_id" t-att-data-interval="'month'">Month</a></li>
<li><a href="#" class="field-selection" t-att-data-field-id="field.id" t-att-data-
id="header_id" t-att-data-interval="'quarter'">Quarter</a></li>
</ul>