Windows: Show some info somewhere that the CMD window for the SSH subprocess should not be closed

[zudljk]

• Try to start the window minimized
• Start SSH with the "verbose" option so the user sees there's something going on in the window
• Show a non-modal message box (only on Windows) that the user should not close the window
• Explore other possibilities of not showing a CMD window for a subprocess

[zudljk]

https://docs.python.org/3/library/subprocess.html#subprocess.Popen Use creationflags = CREATE_NO_WINDOW