overide filters for groups and group lists

- use more sensible query for displaying groups on user page
- privacy_filter now allows group members to see followers_only and private lists and groups they would otherwise not see

bookwyrm/templates/groups/user_groups.html

@@ -3,8 +3,7 @@
 {% load interaction %}
 
 <div class="columns is-multiline">
-    {% for membership in memberships %}
-    {% with group=membership.group %}
+    {% for group in groups %}
     <div class="column is-one-quarter">
         <div class="card is-stretchable">
             <header class="card-header">
@@ -32,6 +31,5 @@
             </div>
         </div>
     </div>
-    {% endwith %}
     {% endfor %}
 </div>