Won't simply closing the current "child window" in emplode accomplish what you want?

To the left of the "File" menu is an icon. Click on that and press "Close". Is that what you wanted? The shortcut to this is supposed to be Ctrl+F4, but I just noticed the shortcut doesn't work in 2.0b7, so I'll report that one. (Alt+dash followed by C works though.)
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Tony Fabris