Offline mode should not generate any output (OSC)

When in offline mode, it should (by default) not output anything, including OSC. I can see how having output would be desirable in many cases while offline programming, controlling integrations with third party, etc., however it seems unsafe and unexpected behavior by nature of the name offline. 

Now to prevent this from being a breaking change, perhaps it should be simply a setup configuration option where it can be chosen by the user. And perhaps (more boldly) something prompted at the first time you open a show file in offline mode to configure.