Admin: tighter user list layout

webapp/templates/admin/users.html

@@ -3,13 +3,17 @@
 
 <a class="btn btn-default" href="/admin">Back</a>
 
+<div style="display: flex; flex-direction: row;">
 {% for group_name, users in groups %}
-  <h2>{{ group_name }}</h2>
-  <ul>
-    {% for uid, name in users %}
-    <li><a href="/admin/users/{{ uid }}">{{ uid }} ({{ name }})</a></li>
-    {% endfor %}
-  </ul>
+  <div style="flex: 1">
+    <h2>{{ group_name }}</h2>
+    <ul>
+      {% for uid, name in users %}
+      <li><a href="/admin/users/{{ uid }}">{{ uid }} ({{ name }})</a></li>
+      {% endfor %}
+    </ul>
+  </div>
 {% endfor %}
+</div>
 
 {% endblock %}