Sounds good Ado. I was going to submit a patch as I was thinking the FinalizeFocusManagement.RefreshDetachedElements() could be called when a document close is detected. Though I`ve not looked at the code too hard and obviously your the best person to make judgement on whats the best approach :)
Really like version 2.0 by the way and the redesign. Works like a charm and plays well with our MVVM model + ninject.