Adding whole_content_page_title even if it is only fully working with bs4

basetheme_bootstrap/templates/basetheme_bootstrap/base.html

@@ -104,6 +104,7 @@
 
 <main role="main" class="{% block container-class %}container{% endblock %}">
     <div class="row">
+        {% block whole_content_page_title %}
         <div class="page-header">
             {% block content_page_title %}
             <div class="col-xs-12">
@@ -114,6 +115,7 @@
                 <hr>
             </div>
         </div>
+        {% endblock %}
         {% if messages %}
         <div class="col-xs-12 ">
             {% for message in messages %}