Fix expanded state handling for trade offers and modify expand all on trade offers listing to persist between pages

theme/templates/trades/_trade_offer_list.html

@@ -11,7 +11,7 @@
         {# Render a trade acceptance using our new tag #}
         {% render_trade_acceptance offer %}
       {% else %}
-        {% render_trade_offer offer %}
+        {% render_trade_offer offer expanded=expanded %}
       {% endif %}
     </div>
   {% empty %}