erp5_core: Display language by default in "Documents" listbox

When we have more than one language and many documents with same reference but with different language, the first impression is that we have many duplicated documents.

Display the language, we can easily detect that we have same reference to different languages.

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Base_viewDocumentList/listbox.xml

@@ -116,10 +116,6 @@
                     <key> <string>all_columns</string> </key>
                     <value>
                       <list>
-                        <tuple>
-                          <string>language</string>
-                          <string>Language</string>
-                        </tuple>
                         <tuple>
                           <string>revision</string>
                           <string>Revision</string>
@@ -185,6 +181,10 @@
                           <string>version</string>
                           <string>Version</string>
                         </tuple>
+                        <tuple>
+                          <string>language</string>
+                          <string>Language</string>
+                        </tuple>
                         <tuple>
                           <string>description</string>
                           <string>Description</string>