One thing I really like about Hangouts is that every time you get a message, that chat window's header turn green in the dock.
Similarly, the chat windows can be "minimized" to the lower part of the screen.
However this features doesn't seem to work this way in elementary OS (I've used OS X and Windows and it works that way). The windows just float around and there's no way to dock each chat window.
It's there a workaround for this?