It is not possible to create a control flow case starting from a Task Flow Return activity.
Indeed a workaround would be to create commit and rollback activities as method call but it is a little 'makeshift' I think ?
And I will not be able to see clearly where commit and rollback operations are done.
OK, to get back to countryTable, it seems I had to change Outcome of Commit and Rollback Task Flow Return activities to "save" and "cancel" respectively, and then create 2 Control flow case from editCountry to countryTable and set From Outcome to "save" and "cancel" too.
Don't know if it is the best solution but it does the job.