Bad labels in the "My Tasks" gadget for tasks migrated from JBPM

In the "My Tasks" dashboard gadget, labels for the tasks that have been migrated from JBPM through the TaskMigrationRunner are bad.
For example, in the attached screenshot, we should have:

• "Document à publier" instead of "org.nuxeo.ecm.platform.publisher.task.CoreProxyWithWorkflowFactory"
• "Modérer le document" instead of "moderate"