Support assigning macs to existing items

inventory-app/templates/inventory_pick.html

@@ -19,7 +19,7 @@
           <td>{% if item.inventory.owner %}<a href="/m/user/{{ item.inventory.owner.username }}">{{ item.inventory.owner.username | display_name }}</a>{% endif %}</td>
           <td>{% if item.inventory.user %}<a href="/m/user/{{ item.inventory.user.username }}">{{ item.inventory.user.username | display_name }}</a>{% endif %}</td>
           <td>
-            <form action="/m/inventory/{{item._id}}/{{action_path}}/{{slug}}" method="get">
+            <form action="/m/inventory/{{item._id}}/{{action_path}}/{{slug}}" method="{{action_method}}">
               <button class="waves-effect waves-light btn" type="submit">{{action_label}}</button>
             </form>
           </td>