templates: page_macros.html checked not default fix.

templates/page_macros.html

@@ -39,7 +39,7 @@
         {% for s in index.subsections %}
         {% set subsection = get_section(path=s) %}
         <li class="sidebar__subsection-page">
-        <input class="sidebar__toggle" type="checkbox" checked="">
+        <input class="sidebar__toggle" type="checkbox" {% if current_path is starting_with(subsection.path) %}checked{% endif %}>
         <svg class="sidebar__toggle-icon" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" preserveAspectRatio="xMidYMid meet" viewBox="0 0 32 32"><path fill="currentColor" d="M22 16L12 26l-1.4-1.4l8.6-8.6l-8.6-8.6L12 6z"></path></svg>
         {{ subsection.title }}
         <ul class="sidebar__subsection">