Move documentation CSS after CSS block

docs/_templates/layout.html

@@ -7,9 +7,6 @@
   {%- block extrahead %} {% endblock %}
   <!-- end extra head -->
   <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
-  <link rel="stylesheet" href="{{ pathto('_static/style.css', 1)|e }}" type="text/css" />
-  <link rel="stylesheet" href="{{ pathto('_static/codeblocks.css', 1) }}" type="text/css" />
-  <link rel="stylesheet" href="{{ pathto('_static/icons.css', 1)|e }}" type="text/css" />
   {%- block css %}
   {%- for css in css_files %}
     {%- if css|attr("filename") %}
@@ -19,6 +16,9 @@
     {%- endif %}
   {%- endfor %}
   {%- endblock %}
+  <link rel="stylesheet" href="{{ pathto('_static/style.css', 1)|e }}" type="text/css" />
+  <link rel="stylesheet" href="{{ pathto('_static/codeblocks.css', 1) }}" type="text/css" />
+  <link rel="stylesheet" href="{{ pathto('_static/icons.css', 1)|e }}" type="text/css" />
   {%- block scripts %}
   <script id="documentation_options" data-url_root="{{ pathto('', 1) }}" src="{{ pathto('_static/documentation_options.js', 1) }}"></script>
   {%- for js in script_files %}