Make a CLI flag to disable the "auto open browser"

There is the likely use case where a custodian wants to start the server on a remote server using the GUI* flag, so that he can then access and manage the bot via web

Currently it will probably crash without a desktop environment, or maybe not. Need more testing.

Also, will need to support logins for remote management and several other adjustments, but I am sure they will make the difference (in future versions)