hide navbar items with different layouts

Author: pietroalbini

_layouts/graphs.html

@@ -15,7 +15,9 @@
                     <h1>PR tracking</h1>
                     <nav>
                         {% for navpage in site.pages %}
-                            <a href=".{{ navpage.url }}" {% if page.repo == navpage.repo %}class="active"{% endif %}>{{ navpage.title }}</a>
+                            {% if navpage.layout == "graphs" %}
+                                <a href=".{{ navpage.url }}" {% if page.repo == navpage.repo %}class="active"{% endif %}>{{ navpage.title }}</a>
+                            {% endif %}
                         {% endfor %}
                     </nav>
                 </div>