erp5_trade: add columns to OrderLine aggregate list view

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/OrderLine_view/my_aggregate_title_list.xml

@@ -9,7 +9,9 @@
         <item>
             <key> <string>delegated_list</string> </key>
             <value>
-              <list/>
+              <list>
+                <string>columns</string>
+              </list>
             </value>
         </item>
         <item>
@@ -69,6 +71,37 @@
             <key> <string>values</string> </key>
             <value>
               <dictionary>
+                <item>
+                    <key> <string>columns</string> </key>
+                    <value>
+                      <list>
+                        <tuple>
+                          <string>title</string>
+                          <string>Title</string>
+                        </tuple>
+                        <tuple>
+                          <string>reference</string>
+                          <string>Reference</string>
+                        </tuple>
+                        <tuple>
+                          <string>Item_getCurrentOwnerTitle</string>
+                          <string>Current Owner</string>
+                        </tuple>
+                        <tuple>
+                          <string>Item_getCurrentSiteTitle</string>
+                          <string>Current Site</string>
+                        </tuple>
+                        <tuple>
+                          <string>description</string>
+                          <string>Description</string>
+                        </tuple>
+                        <tuple>
+                          <string>validation_state</string>
+                          <string>State</string>
+                        </tuple>
+                      </list>
+                    </value>
+                </item>
                 <item>
                     <key> <string>field_id</string> </key>
                     <value> <string>my_view_mode_aggregate_title_list</string> </value>