feat: made all the cohort pages public

There is some info on the page that is only accessible to mentors and
admins and not shown to other users.

school/www/cohorts/cohort.html

@@ -22,7 +22,8 @@
 {% endif %}
 
 <ul class="nav nav-tabs">
-  {{ render_navitem("Subgroups", "", page=page)}}
+  {% set num_subgroups = cohort.get_subgroups() | length %}
+  {{ render_navitem("Subgroups", "", page=page, count=num_subgroups) }}
   {% for p in cohort.pages %}
     {{ render_navitem(p.title, p.slug, page=page) }}
   {% endfor %}
@@ -43,14 +44,10 @@
   {% for sg in cohort.get_subgroups(include_counts=True) %}
     <li class="list-group-item">
       <div>
-        {% if is_admin %}
-          <a class="subgroup-title"
-            style="font-weight: 700; color: inherit;"
-            href="/courses/{{course.name}}/subgroups/{{cohort.slug}}/{{sg.slug}}"
-            >{{sg.title}}</a>
-        {% else %}
-          <span class="subgroup-title">{{sg.title}}</span>
-        {% endif %}
+        <a class="subgroup-title"
+          style="font-weight: 700; color: inherit;"
+          href="/courses/{{course.name}}/subgroups/{{cohort.slug}}/{{sg.slug}}"
+          >{{sg.title}}</a>
         </div>
       <div style="font-size: 0.8em;">
         {{sg.num_mentors}} Mentors
@@ -72,7 +69,7 @@
     >{{title}}
     {% if count != -1 %}
       <span
-        class="badge {{'badge-primary' if active else 'badge-secondary'}}"
+        class="badge {{'badge-primary' if link==page else 'badge-secondary'}}"
       >{{count}}</span>
     {% endif %}
     </a>