OEL-1919: Inject classes per facet type.

templates/facets/facets-item-list.html.twig

@@ -7,7 +7,13 @@
 <div class="facets-widget- {{- facet.widget.type -}} ">
   {% if facet.widget.type %}
     {%- set attributes = attributes.addClass('item-list__' ~ facet.widget.type) %}
-  {% endif %}
+  {%- endif %}
+  {% if facet.widget.type == 'dropdown' -%}
+    {%- set attributes = attributes.addClass('form-select') %}
+  {%- endif %}
+  {% if facet.widget.type == 'checkbox' -%}
+    {%- set attributes = attributes.addClass('oel-facets-checkbox-list') %}
+  {%- endif %}
   {% if items or empty %}
     {%- if title is not empty -%}
       <legend class="col-form-label"><span class="fieldset-legend">{{ title }}</span></legend>