added view invoice action for purchase invoice

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5995 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_accounting/bt/template_action_path_list

@@ -126,6 +126,7 @@ Purchase Invoice Transaction | metadata
 Purchase Invoice Transaction | print
 Purchase Invoice Transaction | source_asset
 Purchase Invoice Transaction | view
+Purchase Invoice Transaction | view_invoice
 Sale Invoice Transaction Line | history
 Sale Invoice Transaction Line | metadata
 Sale Invoice Transaction Line | print