DesktopStreamer reopens if a client is streaming

[bmwesting]

I closed a streaming session for the main GUI, but the streaming session kept showing up because the client machine kept requesting it be opened...

It would probably be expected that a streaming session be closed permanently when closed from the main GUI?

A newly established streaming session should open, but once an established session is closed from the GUI, it should not be allowed to reopen from client-side.