templates: fix big activity icons

circle/dashboard/static/dashboard/dashboard.less

@@ -16,6 +16,11 @@ html {
   margin-top: -4px;
 }
 
+.profile-avatar {
+  width: 24px;
+  height: 24px;
+}
+
 .navbar-fixed-top {
   border: 0px;
 }

circle/dashboard/templates/dashboard/_display-name.html

@@ -2,7 +2,7 @@
 
 {% if user and user.pk %}
   {% if user.profile %}
-    <img src="{{ user.profile.get_avatar_url }}" width="46px" height="46px" title="
+    <img class="profile-avatar" src="{{ user.profile.get_avatar_url }}" title="
   {% endif %}
   {% if user.get_full_name %}{{ user.get_full_name }}{% else %}{{ user.username }}{% endif %}{% if new_line %}<br />{% endif %}