Switching sessions nags too much about reloading the same transducer

[ebrahimebrahim]

When you switch sessions without unloading the current session, it asks for confirmation about reloading the transducer. Confirmation should not be needed when it's the current session's transducer that will be reloaded.

We might later want to ask for confirmation before unloading the active session, but that's a separate matter from reloading transducer