added technology as extra button called overview within navbar

_data/navigation.yml

@@ -2,8 +2,9 @@ nav:
   - title: Home
     link: /
   - title: Technology
-    link: /technology.html
     children:
+      - title: Overview
+        link: /technology.html
       - title: Research
         link: /research.html
       - title: Documentation

_includes/header.html

@@ -17,14 +17,13 @@
     <ul class="l1">
       {% for p in site.data.navigation.nav %}
       {%- capture li_id -%}submenu-{{ forloop.index }}{%- endcapture -%}
-      {%- if page.permalink == p.link -%}
+      {%- if page.permalink == p.link || p.link == "/" -%}
       <li id="{{li_id}}" class="current-l1">
       {%- else %}
       <li id="{{li_id}}">
       {%- endif %}
-        <a class="l1" href="{{ site.baseurl }}{{ p.link }}"
-          title="{{ p.title }}">{{ p.title }}</a>
         {%- if p.children -%}
+        {{ p.title }}
           <button class="collapse-children"
             onclick="navCollapseChildren('{{li_id}}')">&and;
             </button><button class="expand-children"
@@ -42,6 +41,9 @@
               </li>
             {% endfor %}
           </ul>
+        {%- else %}
+        <a class="l1" href="{{ site.baseurl }}{{ p.link }}"
+        title="{{ p.title }}">{{ p.title }}</a>
         {%- endif %}
       </li>
       {% endfor %}