Workflow list edition : Edit button is displayed when the workflow is being modified

Steps to reproduce:

1. Select a workflow on a document.
2. Add a participant.
3. Click on the Edit button below the workflow route.
   => A Save button is displayed. The Edit button is still displayed next to the Save button.
4. Click on the Edit button.
   => Changes are saved.

If you do that with a participant list, and you save changes with the Edit button, the next time you load a list on a workflow, the workflow route is displayed in edit mode.