fix(io): session SReader looses its configuration at stop

Description

session::Sreader forgets its configuration at stop and start. Prevent this when the dialog policy is NEVER, because it means that the file-to-read path is only specified in configuration, and should not be forgotten.

Closes #1126 (closed)

How to test it?

run an application with a session::SReader which reads a file in configuration (ex: a tf). start it, update it, stop it, change your tf. Then start again, and update => you should have your tf again?