Renamed and generalised the photos template a bit, for re-use with IESG photos.

- Legacy-Id: 11274

ietf/templates/group/active_rgs.html

@@ -17,6 +17,7 @@
 
   <h2>Active research groups</h2>
     <a class="btn btn-default" href="{% url "ietf.group.views.all_status" %}">Status Reports</a>
+    <a class="btn btn-default" href="{% url "ietf.group.views.photos" group_type="rg" %}">Chair Photos</a>
 
   <table class="table table-striped table-condensed tablesorter">
     <thead>

ietf/templates/group/active_wgs.html

@@ -20,6 +20,7 @@
       <a class="btn btn-default" href="{% url "ietf.group.views.concluded_groups" %}">Concluded WGs</a>
       <a class="btn btn-default" href="https://www.ietf.org/dyn/wg/charter/history/">Historic charters</a>
       <a class="btn btn-default" href="{% url "ietf.group.views.all_status" %}">Status Reports</a>
+      <a class="btn btn-default" href="{% url "ietf.group.views.photos" group_type="wg" %}">Chair Photos</a>
 
       {% for area in areas %}
         <h2 class="anchor-target" id="{{area.acronym}}">{{ area.name }} ({{ area.acronym }})</h2>

ietf/templates/group/photos.html

@@ -14,9 +14,9 @@
   {% origin %}
   {% load ietf_filters %}
 
-  <h1>Chair Photos</h1>
+  <h1>{{ group_type | upper }} {{ role }} Photos</h1>
 
-  {% regroup chair_roles by last_initial as alphabet_blocks %}
+  {% regroup roles by last_initial as alphabet_blocks %}
   <div class="col-md-11">
   {% for letter in alphabet_blocks %}
    <div class="row anchor-target" id="{{letter.grouper}}">