Updated Closing App

[Mcrich23]

• Doesn't close app when last window closes
• Opens new window when no windows are open

[twostraws]

I'm not sure about this one – is there a specific use case you're thinking of, where folks close the Control Room window and want it to keep running?

[Mcrich23]

I don't keep it in my doc and keeping it in the temp space would be nice.

[twostraws]

Well, let's merge it in and see what folks think – in the unlikely event people hate it, we can revert.