I expect this would need Ashley's involvement. I can see the benefit, especially when using dual screens.
The uistate.xml file is used to maintain the configuration settings, but there doesn't appear to be anything to support debug. This would be the preferred option I reckon.
The other way would to have a debug (undocked) button, but this would require a UI change which I doubt Ashley has time for, due to C2 now just in maintenance mode.
Sorry, Irina, to be of so little help here. Probably a good suggestion for C3, if it hasn't already been proposed.