introducing pre_title_header to help with multi branch environment

basetheme_bootstrap/templates/basetheme_bootstrap/basePasteur.html

@@ -84,7 +84,7 @@
 <main role="main" class="flex-shrink-0">
     <div class="{% block container-class %}container mb-4{% endblock %}">
         <div class="row">
-            {% include_if_exists "pre_title_header.html"|localize_template "basetheme_bootstrap/pre_content_page_title.example.html" %}
+            {% include_if_exists "pre_content_page_title.html"|localize_template "basetheme_bootstrap/pre_content_page_title.example.html" %}
             {% block whole_content_page_title %}
             <div class="pb-2 mt-4 mb-2 col-12">
                 {% block content_page_title %}