Resolve "Tag blog posts with projects, target groups, and maybe tags"

Closes #31 (closed)

templates/menu/infos.html

@@ -10,6 +10,7 @@
       <h1 class="title is-6 is-mega-menu-title">{{ zielgruppe.name }}</h1>
 
       {% for page in zielgruppe.pages %}
+      {% if page.date %}{% continue %}{% endif %}
       <a class="navbar-item" href="{{ page.permalink }}">
         <div class="navbar-content">{{ page.title }}</div>
       </a>