I'm not a big fan of standalones, and know a few people have asked about the demo-host being made into a plugin, so I did just that. :)
I had to edit a few things. There were some statics that I turned into class members and I changed the MainWindow to be a component.
(Instead of having 1 central component, the MainWindow class is the actual component now).
You can find the source code here:
Do as you please.
I can build windows and linux binaries if anyone if interested.
Linux + Ardour4: http://i.imgur.com/QIiLpC1.png
Wine + FL Studio: http://i.imgur.com/U0JmPkO.png