update Sphinx to 3.5.4, jQuery to 3.5.1

doc/sphinx-guides/requirements.txt

@@ -1,2 +1,2 @@
-# match version used by Jenkins
-Sphinx==1.5.6
+# current version as of this writing
+Sphinx==3.5.4

doc/sphinx-guides/source/conf.py

@@ -224,9 +224,7 @@
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
-html_js_files = [
-    'js/jquery-3.4.1.min.js',
-]
+#html_js_files = []
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied

doc/sphinx_bootstrap_theme/bootstrap/layout.html

@@ -9,7 +9,7 @@
 {% endif %}
 
 {% set script_files = script_files + [
-    '_static/js/jquery-3.4.1.min.js',
+    '_static/js/jquery-3.5.1.min.js',
     '_static/js/jquery-ui.min.js',
     '_static/bootstrap-' + bootstrap_version + '/js/bootstrap.min.js',
     '_static/js/jquery-fix.js',
@@ -84,7 +84,7 @@
 <div class="container">
   <div class="row">
     {%- block sidebar1 %}{{ bsidebar() }}{% endblock %}
-    <div class="{{ bs_span_prefix }}{{ bs_content_width }} content">
+    <div class="{{ bs_span_prefix }}{{ bs_content_width }} content" role="main">
       {% block body %}{% endblock %}
     </div>
     {% block sidebar2 %} {# possible location for sidebar #} {% endblock %}

doc/sphinx_bootstrap_theme/bootstrap/search.html

@@ -9,7 +9,11 @@
 #}
 {%- extends "layout.html" %}
 {% set title = _('Search') %}
-{% set script_files = script_files + ['_static/searchtools.js'] %}
+{%- block scripts %}
+    {{ super() }}
+    <script src="{{ pathto('_static/searchtools.js', 1) }}"></script>
+    <script src="{{ pathto('_static/language_data.js', 1) }}"></script>
+{%- endblock %}
 {% block extrahead %}
   <script type="text/javascript">
     jQuery(function() { Search.loadIndex("{{ pathto('searchindex.js', 1) }}"); });