improve new group member adding

The add-members page now looks almost identical to the group
page and is clearer.

bookwyrm/templates/groups/find_users.html

@@ -1,6 +1,8 @@
 {% extends 'groups/group.html' %}
 
-{% block panel %}
-<h1 class="title">Add users to <a href="{{ group.local_path }}">{{ group.name }}</a></h1>
+{% block searchresults %}
+<h2 class="title is-5">
+    Add new members!
+</h2>
   {% include 'groups/suggested_users.html' with suggested_users=suggested_users query=query %}
 {% endblock %}